Add refried beans, ground cumin, a pinch of salt and water to a medium saucepan. Stir often while warming over medium heat. Once bubbling, place a lid on the pot and turn heat off. I like to leave my beans on the burner so they stay warm.
1 15 ounce can refried pinto beans, 1 & ½ teaspoons ground cumin, Pinch of salt, ¼ cup water
Place thawed, raw shrimp in a large bowl. Drizzle olive oil over shrimp and generously season with kosher salt and black pepper. Mix well until each piece is well coated.
10 ounce package frozen shrimp, 1 tablespoon extra virgin olive oil, Kosher or table salt & ground black pepper
Add a little more olive oil to a large skillet on the stovetop and turn heat to medium-high.
Once oil is hot, add shrimp and sauté on each side for 1-2 minutes. Avoid overcrowding the pan and cook in shrifts, if necessary. Once the shrimp is light pink and opaque in appearance, it's done.
Set shrimp in a small bowl to the side, or you can turn off the heat and leave in the skillet to keep it warm.
Add a thin layer of refried beans to each tostada shell (you'll have enough for about 3 tablespoons per tostada when making 10 total).
10 tostada shells
Add shredded cheese on top of refried beans. *Note: I like to assemble my tostadas on a baking sheet so I can pop them in the oven after adding cheese, but it's not necessary. The warm, refried beans should melt the cheese regardless.
1 cup shredded cheddar cheese
Add sour cream, diced avocado, and pico salsa.
1 cup light sour cream, 1 large avocado, 1 cup pico de gallo salsa
Place 2-3 shrimp on each tostada and garnish with fresh cilantro and lime wedges (optional but delicious). Enjoy!
*Tip: you can also serve these tostadas bar style and allow everyone to assemble their own!