Pollo en Pina

3-3 1/2 lbs broiler-fryer chickens, in pieces

1 medium onion, chopped

2 cloves garlic, minced

1 pineapple, cut in

1 inch cubes or 1 (20 ounce) can unsweetened pineapple chunks, drained

1/2 cup dry sherry

2 tablespoons vinegar

1 teaspoon salt

1/4 teaspoon ground cinnamon

1/4 teaspoon ground cloves

1 dash pepper

2 medium tomatoes, coarsely chopped hot cooked rice (can cook concurrently so all is ready at the same time)