01 - In a mixing bowl, whisk eggs with milk or cream, salt, black pepper, and smoked paprika until thoroughly combined.
02 - Heat a nonstick skillet over medium heat and add butter. Sauté red bell pepper and green onion until softened, about 2 minutes.
03 - Pour in the egg mixture and cook gently, stirring until softly set, about 2 to 3 minutes. Remove from heat and reserve.
04 - Place one tortilla on a clean work surface. Distribute half of each cheese evenly, followed by scrambled eggs, chicken, and sautéed vegetables. Sprinkle with remaining cheese.
05 - Cover with the second tortilla, pressing lightly to seal the filling.
06 - Warm a large skillet or griddle over medium heat. Transfer the assembled quesadilla and cook for 2 to 3 minutes per side, pressing gently with a spatula, until golden brown and cheese is fully melted.
07 - Remove from heat, allow to rest for 1 to 2 minutes, then cut into wedges. Serve immediately while hot.