Step 1
Preheat oven to 350°. In a small saucepan over medium heat, add beans and 1 cup of water. Bring to a simmer and let simmer until beans are warmed through, about 10 minutes. Smash with a wooden spoon until most of the beans are smashed with some whole remaining. Add more water as needed to help create a smoother consistency.
Step 2
Meanwhile, place tostadas on a large baking sheet and sprinkle cheese evenly over each. Bake until cheese is melty, about 5 minutes.
Step 3
Top tostadas with beans, avocado slices, and hot sauce.
