Suya Cod Plantain Tacos

Name: Suya Cod Plantain Tacos
Prep time: 20 min
Cook time: 45 min
Total time: 65 min
Ingredients: 1 plantain (medium); 2 tbsp flour; 1/4 cup water; Salt (to taste); 1 white onion; 4 oz cod; 1 avocado (medium); 2 tbsp suya spice; 2 garlic cloves; 1 tbsp olive oil; 1 cup iceberg lettuce; 1 lime; 2 tbsp parsley leaves