Grilled Snapper in Banana Leaf: Pepes Ikan Kakap

Name: Grilled Snapper in Banana Leaf: Pepes Ikan Kakap
Ingredients: 2 pounds snapper filets; Salt and pepper; 1 Bali lemon, or two regular limes; Betutu spice, recipe follows; Banana leaves, or tin foil; 3 salam leaves, or substitute bay leaves; 2 sliced green tomatoes; 2 kaffir lime leaves; 1/4 sweet basil leaves; 1/2 cup peeled shallots; 1/4 cup peeled garlic; 2 tablespoons fresh turmeric; 2 tablespoons fresh peeled ginger; 2 tablespoons galangal; 3 pieces lemongrass; 2 tablespoons fresh hot chili peppers seeded and cleaned; 2 tablespoons palm sugar chopped; 4 tablespoons shrimp paste; 1/4 cup coconut oil, for frying