Prepare ingredients as instructed above.
Cook vegetables: Heat olive oil in a nonstick skillet over medium heat. Add yellow onion and red bell pepper. Sauté 4 to 5 minutes until softened. Stir in spinach, saute until wilted.
Add eggs and beans: Pour in beaten eggs and black beans. Scramble gently until eggs are just set.
Warm tortillas: Warm whole wheat tortillas in a dry skillet or microwave until pliable.
Assemble burritos: Spoon egg mixture onto tortillas. Top with cheese and avocado if using. Fold and roll tightly.
Brew and prepare the coffee to your liking.
Serve: Serve the burrito with optional salsa, sour cream, hot sauce, fruit, coffee, and milk.