Cheesy Veggie Breakfast Quesadillas

Ingredients

• 1 tablespoon vegetable oil
• 1/4 teaspoon black pepper
• 4 flour tortillas (burrito size)
• 1/4 teaspoon salt
• 1 cup shredded cheddar cheese
• Optional: salsa for serving
• 1 small onion, finely chopped
• 4 large eggs
• 1 small red bell pepper, finely chopped