Saute Tomatillos, Tomatoes, Garlic And Onion In Skillet For 5 Minutes. Process To A Smooth Paste With 2 Tablespoons Of Beans. Cook Pork In 3 Cups Water With Salt Over Moderate Heat For 1 Hour. Drain. In Saucepan Saute Meat Until Well Browned. Add Sauce And Simmer Over Moderate Heat For 5 Minutes. Add Beans And Simmer For 15 Minutes. Serve With Tortillas.