Cook Chicken, Garlic, Salt And Potatoes In Water For 30 Mintues. Reserve 2 Cups Broth. Process Into A Smooth Paste Tomato, Tomatillos, Thyme And Onion With The Reserved Broth. In Large Saucepan, Fry The Sauce With The Bay Leaf In The Oil For 3 Minutes. Add Chicken And Potatos And Simmer Over Low Heat For 15 Minutes. Serve With Rice Or Tortillas.