Bacon, Tomato, and Avocado Flatbread
1 avocado - peeled, pitted, and sliced 1 cup grated Cheddar cheese 1 small tomato, seeded and diced 1 tablespoon chopped fresh cilantro 1 teaspoon buffalo ranch dressing, or to tast… 1 teaspoon ranch dressing, or to taste 2 flour tortillas 3 slices cooked bacon, crumbled, or more to t… cooking spray salt and ground black pepper to taste ½ cup onion, diced