01 -
Preheat the oven to 330 degrees Fahrenheit (165°C).
02 -
In a medium pan over medium heat, melt the butter. Add the chopped red onions and minced garlic. Cook until the onions are soft and translucent, and the garlic is fragrant.
03 -
Add the heavy cream and grated Parmesan cheese to the pan with the onions and garlic. Cook, stirring constantly, until the mixture is bubbly and the cheese is melted. Remove from heat and set aside.
04 -
Lightly oil a medium-sized casserole dish. Add the drained tuna and chopped broccoli to the dish. Use a spoon or your hands to evenly combine the ingredients and make sure the broccoli is coated with a little oil.
05 -
Pour the creamy sauce over the broccoli and tuna in the casserole dish, distributing it evenly. Sprinkle the shredded cheddar cheese and crushed pork rinds over the top as a crunchy, cheesy topping.
06 -
Bake in the preheated oven for 30 minutes, or until the casserole is bubbly and the topping is golden brown.
07 -
Remove from the oven and serve hot. This dish can be a complete meal on its own or paired with a simple green salad.