01 -
Heat a large non-stick skillet over medium-high heat and add olive oil. Season thinly sliced steak with garlic powder, smoked paprika, salt, and black pepper. Sauté for 3-4 minutes, stirring occasionally, until steak is browned and cooked through. Remove from heat and set aside.
02 -
Place one tortilla on a clean work surface. Distribute half the cheddar and mozzarella cheese evenly over half of the tortilla. Layer with cooked steak, adding sautéed onions and bell peppers if desired. Sprinkle remaining cheese on top and fold tortilla over to form a half-moon.
03 -
Clean the skillet and return to medium heat. Place folded quesadilla in the skillet and cook for 2-3 minutes per side, or until exterior is golden brown and cheese is melted. Repeat with remaining tortillas and filling.
04 -
Transfer cooked quesadillas to a cutting board and allow to rest for 1-2 minutes. Slice into wedges and serve immediately with optional toppings such as sour cream, salsa, or guacamole.