Heat vegetable oil in a large sauté pan over medium heat, then stir in the minced garlic and cook until fragrant, about 30 seconds.Add the cauliflower, bell pepper, jalapeno, and onion, then season with paprika, chili powder, cayenne, cumin, and salt. Stir to combine and sauté until vegetables are slightly softened, about 10 to 15 minutes, then stir in the lime juice and remove from heat.
In the meantime, prepare the toppings. In a small bowl, combine the avocado, lime juice, and salt and mash until smooth. Adjust lime juice and salt to taste.Warm the refried beans.
Finally, assemble the tostadas. We recommend spreading a layer of refried beans on each tostada, then adding 2 to 3 spoonfuls of the veggie mixture. Top with mashed avocado. Optionally add shredded Mexican cheese or other Mexican cheeses like cotija or queso fresco. Serve immediately
Notes
Veggies: Keep a close eye on the veggies as you sauté them. If the heat is too high, you'll run the risk of overcooking them and they'll be limp and soft. You want them to be slightly soft but still have a bit of texture.Spices: The seasonings make the veggies quite spicy, so if you prefer a more mild flavor we recommend reducing the seasonings by half.Avocado: Mashed avocado with lime and salt is our go-to for an easy topping, but you can also use your favorite guacamole recipe (or store-bought) if you prefer. Tostadas are wonderful because you can customize the toppings to your liking!Cheese: When we serve these with shredded Mexican blend cheese, we often put the cheese right on top of the beans, underneath the veggies. The warm beans make the cheese a little melty which is so delicious.