Spaghetti with Puttanesca Sauce

Here is a recipe for an easy Puttanesca sauce:

1/2 c chopped onions
4 garlic cloves, minced
1/2 t. red pepper flakes
1/2 c. sliced black olives
2 T. capers, rinsed and chopped
1 can (14 oz) diced tomatoes
salt and pepper to taste

Saute onions and garlic for 30-40 seconds.  Stir in the rest of ingredients.  Simmer until slightly reduced.  Taste and adjust seasoning with salt and pepper.  I didn't add any salt, but that is just me.  Now I know that the sauce usually calls for anchovies but I never have them on hand and this is quite tasty without.  I tossed the sauce with whole wheat spaghetti and steamed zucchini on the side. 

The whole dish:  2 ounces uncooked whole wheat spaghetti, cooked
                            1/2 c. Puttanesca suace                                   
                            Zucchini, steamed                             
                                                                            6 points