Spaghetti with Red Clam Sauce

2 (10 ounce) cans whole baby clams and liquid
1 cup minced onions
1 minced clove garlic
2 tablespoons olive oil
1 (8 ounce) can tomato sauce
1 (6 ounce) can tomato paste
1 No. 2 1/2 can Italian tomatoes
1 teaspoon salt
1/4 teaspoon pepper
1/2 teaspoon sweet basil
1/2 teaspoon oregano
1 tablespoon chopped parsley
1 pound spaghetti, cooked
Parmesan cheese (optional)

In a Dutch oven saut