Tomato Dressing

13 grape tomatoes, sliced in half
2 tablespoons fine salted butter
1 tablespoon extra virgin olive oil
1 tablespoon red wine vinegar

Melt butter over low heat. Add tomatoes, cut side down to pan, tomatoes will barely simmer. Once tomatoes have begun to wither and wrinkle, about 10 minutes Remove from heat to a blender. Add red wine vinegar and puree until smooth. Season with salt.