01 - In a mixing bowl, whisk eggs with milk or cream, salt, black pepper, and smoked paprika until homogenous.
02 - In a nonstick skillet over medium heat, melt butter. Sauté red bell pepper and green onion until tender, about 2 minutes.
03 - Pour the egg mixture into the skillet and gently scramble until softly set, approximately 2–3 minutes. Remove from heat and reserve.
04 - Lay one tortilla on a flat surface. Scatter half of each cheese evenly over, then layer scrambled eggs, chicken, and sautéed vegetables over the cheese. Top with remaining cheese.
05 - Place the second tortilla over the filling, pressing gently.
06 - Carefully transfer the assembled quesadilla to a large skillet or griddle over medium heat. Toast for 2–3 minutes per side, pressing lightly with a spatula, until both sides are golden and cheese is melted.
07 - Transfer quesadilla to a board, allow to rest briefly (1–2 minutes), then slice into wedges. Serve hot.