01 - Whisk together eggs, milk, salt, and pepper in a mixing bowl until well combined.
02 - Heat olive oil in a medium skillet over medium heat. Add diced red onion and red bell pepper and sauté for 2–3 minutes, until softened.
03 - Add chopped spinach and continue to cook for 1 minute until just wilted.
04 - Reduce heat to low. Pour in the egg mixture and gently scramble with a spatula until softly set, about 3 minutes.
05 - Stir in chopped turkey or chicken breast and black beans. Cook for 1 additional minute to heat through.
06 - Sprinkle in shredded cheddar cheese and stir gently until fully melted and the filling is creamy.
07 - Warm the tortillas in a dry skillet or microwave for 15 seconds to make them more pliable.
08 - Divide the filling evenly between the tortillas. Fold in the sides and roll up tightly to form burritos.
09 - Serve immediately while hot, with salsa on the side if desired.