01 - Whisk eggs, low-fat milk, salt, and black pepper in a mixing bowl until well combined.
02 - Heat olive oil in a medium nonstick skillet set over medium heat. Add diced red onion and bell pepper; sauté for 2 to 3 minutes until vegetables become softened.
03 - Add chopped spinach to the skillet and cook for 1 minute until wilted.
04 - Reduce heat to low. Pour in the egg mixture and gently scramble, stirring frequently, until the eggs are just set, about 3 minutes.
05 - Stir in chopped cooked turkey or chicken and black beans. Cook for 1 minute more to heat through.
06 - Sprinkle in shredded cheddar cheese and stir gently until the cheese is melted and incorporated.
07 - Warm the whole wheat tortillas in a dry skillet or in the microwave for about 15 seconds to make them pliable.
08 - Divide the filling evenly between the tortillas. Fold in the sides and roll each tortilla tightly to create burritos.
09 - Plate immediately and serve hot with salsa, if desired.