2 tablespoons of olive oil or rice bran oil.
1 large onion, diced
1-2 tbs chipotle chile powder
4 C cooked black beans (see Master Bean Recipe.)
1 (28 oz) can peeled, diced tomatoes
1/2 C tomato paste
4 C vegetable stock
4 hard-neck garlic cloves, minced
salt and freshly ground tellicherry peppercorns to taste
1 oz unsweetened (100%) chocolate
sour cream or plain yogurt , for serving
chopped scallions, for serving