2 tablespoons cooking oil
1 onion, chopped
1 green bell pepper, chopped
3 cloves garlic, minced
3/4 cup long-grain rice
1/4 teaspoon red-pepper flakes
1 3/4 teaspoons salt
1 3/4 cups canned crushed tomatoes in thick puree (from one 15-ounce can)
5 cups water
1 cup canned unsweetened coconut milk
1 1/2 pounds medium shrimp, shelled and cut in half horizontally
1/4 teaspoon fresh-ground black pepper
1 tablespoon lemon juice
1/2 cup chopped fresh parsley or cilantro