For the Tostadas:

• 12 tostada shells
• Cooking spray

For the Shrimp Marinade:

• 1½ lb raw peeled shrimp
• 2 tsp chili powder
• 1 tsp cumin
• 1 tsp oregano
• 1 tsp garlic powder
• 1 tsp onion powder
• 1 tsp salt
• ¼ tsp black pepper
• 2 tsp olive oil

For the Guacamole:

• 2 avocados, mashed
• ½ small bunch cilantro, minced
• 1 tsp minced garlic
• Juice from 1 lime
• ½ tsp salt
• ¼ tsp pepper

For the Pico de Gallo:

• 3–4 tomatoes, seeded and diced
• 1 tsp minced garlic
• 1 jalapeño, minced
• ½ medium red onion, minced
• ½ small bunch cilantro, minced