Cheesy Veggie Casserole

Featured in Savory Side Dishes.

From-scratch zucchini casserole combining fresh vegetables with Parmesan and Romano cheese. No baking mix needed.
Casey
Updated on Mon, 20 Jan 2025 20:11:03 GMT
A sliced zucchini dish is served on a plate, showing a golden-brown top and a creamy interior. Pin it
A sliced zucchini dish is served on a plate, showing a golden-brown top and a creamy interior. | cookingwithcasey.com

When my garden zucchini comes in by the basketful this cheesy bake is my absolute favorite way to use them. The combination of Pecorino Romano and Parmesan creates something magical that takes me right back to Sunday dinners at my grandma's house. It's become my signature dish for everything from casual brunches to dinner parties.

A Recipe Close to My Heart

This recipe started in my mom's kitchen where she'd make it for every family gathering. Over the years I've added extra cheese and tweaked her technique just a bit. Now my version has become the most requested dish at our get togethers.

Our Family's Secret Ingredient

Let me tell you about the magic of Pecorino Romano in this dish. Mom discovered this trick years ago and it completely transforms the flavor. That sharp salty bite makes everyone come back for seconds and ask what makes it so special.

Real Ingredients Real Flavor

Skip those boxed mixes for this recipe. I promise the extra few minutes of measuring flour and baking powder are so worth it. The flavors are cleaner the texture is perfect and you'll never go back to premade mixes again.

The Perfect Slice

Getting those zucchini slices just right makes all the difference. I love using my mandoline for perfect eighth inch rounds. A sharp knife works too just take your time. The key step nobody tells you? Pat those slices dry really well. It's my foolproof trick for avoiding a soggy casserole.

A slice of golden-brown zucchini bake topped with herbs, served on a white plate next to a red napkin. Pin it
A slice of golden-brown zucchini bake topped with herbs, served on a white plate next to a red napkin. | cookingwithcasey.com

What You'll Need From Your Pantry

The beauty of this recipe is how it transforms simple ingredients into something extraordinary. Fresh zucchini garlic and onions bring the flavor while two kinds of cheese add richness. A splash of olive oil and some dried basil from my garden tie everything together perfectly.

Bringing It All Together

My favorite part is mixing everything in one big bowl. Make sure to break up any zucchini that's sticking together so every bite has the perfect balance of vegetables and cheesy goodness. The batter might look a bit thick but trust me it bakes up beautifully.

Watch the Magic Happen

Your kitchen will smell amazing while this bakes. Keep an eye on that top getting golden brown and those edges turning crispy. That's when you know it's perfect. I always steal a little crispy edge piece while it's cooling it's impossible to resist.

My Best Kitchen Tips

After making this hundreds of times I've learned a few tricks. Weighing the zucchini gives perfect results every time. If you're using garden zucchini pick the medium ones the big ones can be bitter. And don't skip drying those slices it's absolutely worth the extra few minutes.

Perfect Pairings

This zucchini bake is so versatile. We love it alongside grilled chicken for dinner or next to a fresh salad for lunch. During the holidays it's always on our table right next to the turkey. The leftovers are amazing with eggs for breakfast too.

A baked dish featuring layers of zucchini topped with melted cheese in a glass baking dish. Pin it
A baked dish featuring layers of zucchini topped with melted cheese in a glass baking dish. | cookingwithcasey.com

From Brunch to Dinner

I've served this at fancy brunches casual potlucks and everything in between. It always fits right in and there's never any leftover. The best part is you can make it ahead which makes entertaining so much easier.

Time to Get Creative

Sometimes I toss in colorful bell peppers or sautéed mushrooms when I want to change things up. My sister swears by using Fontina instead of Romano. This recipe is so forgiving feel free to make it your own.

Better the Next Day

Here's a little secret this bake actually tastes better the day after. The flavors have time to meld together overnight. I often make it ahead just for that reason. Just warm it up in the oven to bring back that crispy top.

Good and Good for You

This dish lets me sneak extra vegetables onto everyone's plate without any complaints. The cheese makes it irresistible while all that zucchini adds nutrients. It's the perfect balance of healthy and delicious.

Wine and Dine

Love enjoying this with a glass of crisp white wine. A light Pinot Grigio or Sauvignon Blanc works beautifully. The fresh acidity cuts through the richness of the cheese making every bite perfect.

A slice of baked zucchini casserole sits on a decorative white plate, garnished with herbs, alongside a fork. Pin it
A slice of baked zucchini casserole sits on a decorative white plate, garnished with herbs, alongside a fork. | cookingwithcasey.com

Everyone's Favorite

Even people who think they don't like zucchini fall in love with this dish. The cheesy crust and tender vegetables win over every skeptic. I always bring copies of the recipe because I know people will ask for it.

Making It Gluten Free

My gluten free friends can enjoy this too. Just swap in your favorite cup for cup gluten free flour blend. I've tried several brands and they all work beautifully. Nobody can tell the difference.

Simple Clean Up

One of the things I love most about this recipe is how few dishes it uses. Just one mixing bowl and a baking dish. Less time cleaning means more time enjoying good food with the people you love.

Freeze for Later

During zucchini season I make several batches to freeze. Cut it into portions wrap well and pop in the freezer. It's such a treat to pull out a slice on busy weeknights. Two months later it still tastes like summer.

More Than Just a Recipe

This zucchini bake has become so much more than just another recipe in my collection. It's weekend brunches with friends summer gatherings and holiday memories. Every time I make it I think of my mom and all the love she poured into her cooking.

A slice of zucchini frittata topped with fresh parsley, served on a white plate. Pin it
A slice of zucchini frittata topped with fresh parsley, served on a white plate. | cookingwithcasey.com

Frequently Asked Questions

→ Why pat dry the zucchini?
Removes excess moisture to prevent soggy casserole.
→ Can I make a smaller portion?
Halve ingredients for 8x8 pan but keep same baking time.
→ What size zucchini works best?
Use medium zucchini without large seeds which can be bitter.
→ How long does it keep?
Stores in refrigerator up to 5 days.
→ Why let it rest before serving?
Allows casserole to set for better texture and easier slicing.

Italian Zucchini Bake

A savory zucchini casserole featuring fresh zucchini, onions and two Italian cheeses. Made completely from scratch.

Prep Time
25 Minutes
Cook Time
60 Minutes
Total Time
85 Minutes
By: Casey

Category: Perfect Sides

Difficulty: Intermediate

Cuisine: Italian-American

Yield: 12 Servings (1 9x13 pan)

Dietary: Vegetarian

Ingredients

01 1½ pounds zucchini.
02 1 small white onion.
03 2 cloves garlic.
04 ½ cup olive oil.
05 4 extra-large eggs.
06 1 cup flour.
07 4 teaspoons baking powder.
08 ½ cup grated Parmesan.
09 ½ cup grated Romano.
10 ½ teaspoon salt.
11 ½ teaspoon pepper.
12 ¼ teaspoon dried basil.
13 Butter for greasing.

Instructions

Step 01

Heat oven to 375°F. Slice zucchini 1/8 inch thick, pat dry.

Step 02

Combine zucchini, onion, garlic. Beat oil and eggs, add to vegetables.

Step 03

Mix in flour, baking powder, cheeses and seasonings.

Step 04

Transfer to buttered 9x13 pan. Bake 55-60 minutes until browned.

Notes

  1. Weigh zucchini for accuracy.
  2. Avoid large seedy zucchini.
  3. Rest 5 minutes before slicing.

Tools You'll Need

  • 9x13 glass pan.
  • Mandoline or food processor.

Allergy Information

Please check ingredients for potential allergens and consult a health professional if in doubt.
  • Dairy.
  • Eggs.
  • Wheat.

Nutrition Facts (Per Serving)

It is important to consider this information as approximate and not to use it as definitive health advice.
  • Calories: 188
  • Total Fat: 13 g
  • Total Carbohydrate: 11 g
  • Protein: 6 g