01 -
Heat olive oil or butter in a skillet over medium-high heat. Add diced onion, bell pepper, Italian seasoning, dried basil, salt, and pepper. Cook, stirring frequently, for 3 to 4 minutes until vegetables soften and begin to caramelize. Remove from heat and set aside.
02 -
Place four flour tortillas flat on a clean surface. Evenly spread about 2 tablespoons marinara sauce on each tortilla, leaving a small border around edges to prevent spilling during cooking.
03 -
Distribute sautéed vegetables, pepperoni slices, and grated mozzarella cheese evenly over each sauced tortilla, ensuring balanced coverage for even flavor in every bite.
04 -
Top each filled tortilla with another plain tortilla. Press down gently to secure the layers, which will help the cheese melt uniformly and keep fillings in place during cooking.
05 -
Return the skillet to medium heat. Place one assembled quesadilla in the pan. Cook for 2 to 3 minutes until the bottom turns golden and crisp. Carefully flip and cook the other side for 2 to 3 minutes until cheese melts and both sides are evenly browned.
06 -
Remove quesadilla from skillet and let rest for about one minute to firm up. Slice into wedges and serve immediately with extra marinara sauce for dipping if desired.