01 - In a medium mixing bowl, whisk together eggs, low-fat milk, salt, and pepper until well combined.
02 - Heat olive oil in a large nonstick skillet over medium heat. Add diced red onion and bell pepper; sauté for 2 to 3 minutes until vegetables are softened.
03 - Add chopped spinach and cook for 1 minute until wilted, stirring gently.
04 - Reduce skillet heat to low. Pour in the egg mixture and gently scramble, stirring frequently, until eggs are softly set, about 3 minutes.
05 - Stir in chopped turkey or chicken and black beans. Cook for 1 additional minute until heated through.
06 - Sprinkle shredded cheddar cheese over the filling and stir until melted and evenly distributed.
07 - Warm the whole wheat tortillas in a dry pan or microwave for 15 seconds until pliable.
08 - Divide the prepared filling evenly between the tortillas. Fold in the sides and roll up tightly to form burritos.
09 - Serve burritos immediately with salsa on the side, if desired.