Was it Ruthanna's Basil Garlic Butter? It's wonderful. What forum mentioned it? Did you ask there?

RUTHANNA'S TOMATO-BASIL BUTTER
1 Tbs. olive oil
1 1/ 2 cups peeled, seeded and chopped tomatoes (about 1 lb.)
2 tsp. minced garlic
1/ 2 cup sweet butter softened
2 tsp. grated lemon rind
1/ 2 tsp. salt
1/ 8 tsp. pepper
1/ 4 cup minced fresh basil

Heat the olive oil in a small skillet. Add the tomatoes and garlic and saute, stirring occasionally, for about 10 minutes or until the tomatoes form a puree that will mound. Let cool.

Put the butter in a mixing bowl and beat in the tomatoes and remaining ingredients.

Can be made up to 2 days ahead and refrigerated but best served at room temperature so that it will melt quickly over the food, such as grilled shrimp, fish, chicken, pork, vegetables.