To make homemade tostadas: Lightly spray both sides of 8 corn tortillas with cooking spray; place them in a single layer on a baking sheet; lightly season with salt; and bake for 10 minutes, flipping halfway through, until they are crispy like a chip.
Spicy Shrimp Tostadas
Serves 8 as an appetizer, or 4 as a light meal. Adapted from “Enchiladas: Aztec to Tex-Mex” by Cappy Lawton and Chris Waters Dunn
For the sauce:
5 ancho chiles, cleaned, de-stemmed and de-seeded
2-3 chipotles in adobo
Zest of 1 orange
Juice 1/2 orange
3/4 cup rice wine vinegar
1-inch knob fresh ginger, peeled and grated
1/2 teaspoon oregano
1/2 teaspoon ground allspice
1/2 medium white onion, peeled and diced small
2 tablespoons sugar
1 1/4 cup vegetable oil
Kosher salt to taste
1 pound medium cooked and peeled shrimp
For assembly:
8 tostada shells
Romaine or butter lettuce leaves, chopped
1/2 cup diced cucumber
1/4 cup diced white onion
8 cherry tomatoes, quartered, for garnish
Crumbled queso fresco and/or Cotija cheese, for garnish
Cilantro leaves, for garnish
Prepare sauce. Wipe chilies with a damp paper towel to remove dust, then cut a slit down the side to remove the seeds, veins and stem.
Soak roasted chilies in a bowl of hot water until soft, about 15 minutes. Drain, then place in blender with chipotles, orange zest and juice and vinegar, and pulse until the chilies and zest are finely minced. Add ginger, oregano, allspice, onion and sugar.