Shrimp Curry, Caribbean Style

1 medium onion, chopped
2 tablespoons butter or margarine
4 medium tomatoes, chopped, or 2 (16 ounce) cans
    tomatoes, drained and chopped
1/2 teaspoon salt
1/2 teaspoon ground coriander
1/2 teaspoon ground turmeric
1/4 teaspoon ground ginger
1/4 teaspoon ground cumin
1/8 teaspoon ground red pepper
2 cups cleaned cooked shrimp
Hot cooked rice
Chutney

Cook and stir onion in butter in 10-inch skillet until tender, about 3 minutes. Add tomatoes, salt, coriander, turmeric, ginger, cumin and red pepper. Heat to boiling; reduce heat. Cover and simmer 15 minutes. Stir in shrimp; heat until shrimp are hot, 3 to 5 minutes.

Serve with rice and chutney.