Mariscada En Recado (Shellfish Stew)

INGREDIENTS: 2 tablespoons olive oil 1 onion, chopped fine 4 cups chicken stock or 4 cups fish stock or 4 cups vegetable stock 4 tablespoons goya recaito (cilantro cooking base) 2 tablespoons tomato paste 14 ounces coconut milk (or whatever size your can is, they vary) 12 littleneck clams, thoroughly washed 12 mussels, thoroughly washed…