Shrimp Stuffed Plantain Cups (Tostones Rellenos)

Name: Shrimp Stuffed Plantain Cups (Tostones Rellenos)
Prep time: 10 min
Cook time: 30 min
Total time: 40 min
Cuisine: American, Latin American
Ingredients: 1 pound large shrimp; 1 tsp salt; 2 tsp Black Pepper; 2 tsp Onion Powder; 1 tsp Cumin; 1/4 tsp Cayenne Pepper; 1 1/2 tbsp unsalted butter; 2 tsp minced garlic; 1 ripe avocado, diced; 1 tomato, diced; 1-2 jalapenos, diced; 1/2 red onion, diced; 1/4 cup chopped cilantro; 1 lime, juiced; 2 tsp garlic powder; 4 green plantains; canola oil (please read the instructions for the amount of oil)