Prepare all ingredients as listed. Wash and cut fruit as needed.
Make the pico de gallo: In a bowl, combine tomato, onion, cilantro, jalapeño, lime juice, salt, and black pepper. Mix well and set aside.
Cook sausage: In a skillet over medium heat, cook breakfast sausage until browned. Add diced onion and bell pepper, and sauté until softened.
Scramble eggs: Pour beaten eggs into the skillet with sausage and vegetables. Cook, stirring occasionally, until eggs are fully scrambled.
Assemble quesadillas: Lay tortillas flat. Spread egg mixture over half of each tortilla. Sprinkle it with cheddar cheese. Fold tortillas in half to form half-moons.
Cook quesadillas: Spray a clean skillet with nonstick spray. Cook quesadillas 2–3 minutes per side until golden brown and cheese is melted.
Serve: Cut quesadillas into wedges, top with avocado slices, and serve with pico de gallo, fruit, and orange juice.