Clam Fettucine (Red Sauce)

Here's Mom's recipe for Clam Fettucine. Thanks, Denise!

1/4 cup margarine

1/2 cup chopped onion

3 tsp. flour
1 tsp. each sugar, oregano
1/2 tsp. salt
dash pepper
1 can (16 oz) whole tomatoes, undrained
1 can tomato sauce
2 (or more) 6 oz cans minced clams, drain 1 can
1/4 cup sliced olives
4 cups cooked noodles
1/4 cup parmesan 

Melt 2 tbsp. margarine in pan. Add onions and cook. Mix flour, sugar, oregano, salt & pepper into onion mix. Add tomatoes, sauce, clams and olives. Cook until sauce thickens.

Combine hot noodles, 2 tbsp. margarine & cheese. Toss until evenly coated. Pour sauce over noodles.