Bob’s Simple Tomato and Butter Sauce

1 lb. fresh plum tomatoes, chopped
3 tbsp butter
One small onion, peeled and cut in half
1/3 cup good dry white wine
Parmigiano-reggiano cheese
Salt and black pepper to taste

Put all ingredients, except the cheese, in a saucepan and simmer over low heat until tomatoes have broken down and the onion is tender – about 20 minutes.
Remove pan from heat and discard the onion.  Toss with your pasta of choice and top with lots of Parmesan cheese.
So simple and so delicious!