01 - In a mixing bowl, thoroughly whisk eggs with milk or cream, salt, black pepper, and smoked paprika until fully blended.
02 - Heat a nonstick skillet over medium heat. Melt the butter, then sauté the chopped red bell pepper and sliced green onion until softened, about 2 minutes.
03 - Pour the egg mixture into the skillet. Gently scramble until eggs are softly set, approximately 2 to 3 minutes. Remove from heat.
04 - Place one tortilla on a clean cutting board. Evenly sprinkle half of each cheese across the surface. Layer the scrambled eggs, cooked chicken, and sautéed vegetables. Top with remaining cheese.
05 - Place the second tortilla on top to enclose the fillings and press gently to seal.
06 - Heat a large nonstick skillet or griddle over medium heat. Carefully transfer the assembled quesadilla onto the skillet. Cook for 2 to 3 minutes on each side, pressing lightly with a spatula, until golden brown and the cheese has melted.
07 - Remove from heat and let rest for 1 to 2 minutes. Slice into wedges and serve immediately while hot.