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