01 -
Preheat the oven to 400°F (200°C).
02 -
In a nonstick skillet over medium-high heat and working in batches, cook the steak slices for 5-7 minutes, or until done, stirring occasionally.
03 -
Transfer cooked steak to a colander to drain any excess liquid, then return it to the skillet.
04 -
Add 2 tablespoons of avocado oil to the skillet and season the steak with 1 tablespoon of Montreal Steak Seasoning, or to taste.
05 -
Add the American cheese slices and grated pepper jack cheese to the skillet, mixing until melted and evenly coating the steak.
06 -
If using raw tortillas, cook them as per package instructions. Place the steak and cheese mixture onto each tortilla and fold into a chimichanga shape.
07 -
Brush the folded chimichangas with melted butter and arrange on a baking sheet.
08 -
Bake in the preheated oven for 15-20 minutes, or until tortillas are crispy and golden brown.
09 -
Serve the chimichangas hot with salsa, sour cream, and cilantro on the side.