3 tbsp. olive oil
4 cloves garlic
1 med. onion, chopped

Saute onion and garlic in olive oil until tender. Remove garlic. In blender mix:

1 lg. can Italian tomatoes
1/2 tsp. salt
1/4 tsp. basil
1/2 tsp. pepper
1/4 tsp. oregano

Blend all ingredients together well. cook for 20 minutes. In the meantime, cook spaghetti, drain and add 1 tablespoon butter. Pour sauce over spaghetti. Serve with chopped parsley and Parmesan cheese sprinkled over top.