Ceviche de Camaron Tostada

Name: Ceviche de Camaron Tostada
Prep time: 1 h 20 min
Total time: 1 h 20 min
Cuisine: Mexican
Ingredients: 1 pound raw shrimp, (deveined, peeled, and chopped); 1 cup fresh lime juice, (about 8-9 limes ); 3 Roma tomatoes, (diced); ½ large white onion, (diced); 1-2 jalapeño or serrano chiles, (finely chopped (remove seeds for less heat)); ¼ cup cilantro, (chopped); salt, (to taste); pepper, (to taste); 8 tostada shells, (pre-made or homemade); 3 tablespoons oil; 1 avocado, (cut into ½-inch cubes, for garnish); hot sauce, (for garnish)