Step 1Place beef in roasting pan or Dutch oven. Coat with olive oil and minced garlic and sprinkle with salt and pepper to taste. Bake uncovered at 400 degrees 10 minutes.
Step 2Meanwhile, combine tomatoes, onion, garlic cloves, peppers, cloves and peppercorns in saucepan and cook over medium-low heat 8 minutes. Puree in blender with epazote and stock. Add pureed mixture to beef, cover and bake 5 minutes longer. (Beef should remain slightly pink in center.) Place beef on platter, cut into slices and ladle sauce over top.