Molletes with Deconstructed Guacamole

Ingredients (12)

• + 4 bolillo rolls, sliced in half lengthwise add to pantry
• + 4 tablespoons butter or margarine, softened add to pantry
• + 1 (20.5 ounce) can refried pinto beans add to pantry
• + 1 cup shredded mozzarella cheese add to pantry
• + 2 Roma tomatoes, thinly sliced add to pantry
• + 2 avocados from Mexico, peeled, pitted and sliced crosswise add to pantry
• + ½ small red onion, thinly sliced add to pantry
• + 2 tablespoons chopped fresh cilantro add to pantry
• ✓ ½ teaspoon ground cumin
• + ½ teaspoon salt add to pantry
• + 2 teaspoons extra-virgin olive oil add to pantry
• ✓ 1 lime, sliced into rounds