Does anyone have suggestions for how to make a great sauce without garlic or onion or peppers? Can't have allium and can't stand peppers. I have a big box of tomatoes from the farmer's market that I want to cook up and freeze, and I'd love some suggestions. I'm thinking mushrooms, lots of herbs, balsamic vinegar (I stay away from red wine b/c it gives me migraines). What else? I'd like it to be thick and flavorful. Thanks!