Grilled Shrimp Tostadas with Fresh Guacamole and Pico de Gallo

Ingredients

• 12 tostada shells
• Cooking spray
• 680 g raw shrimp, peeled
• 2 teaspoons chili powder
• 1 teaspoon ground cumin
• 1 teaspoon dried oregano
• 1 teaspoon garlic powder
• 1 teaspoon onion powder
• 1 teaspoon salt
• 1/4 teaspoon ground black pepper
• 2 teaspoons olive oil
• 2 avocados, mashed
• 1/2 small bunch cilantro, finely minced
• 1 teaspoon garlic, minced
• Juice of 1 lime
• 1/2 teaspoon salt
• 1/4 teaspoon black pepper
• 3–4 tomatoes, seeded and diced
• 1 jalapeño, finely minced
• 1/2 medium red onion, finely minced