Beef Stock - Master Chefs Recipe
2 tb Oil, vegetable 6 lb Bones, beef, meaty 2 md Onions, trimmed, quartered -- don't peel 2 lg Carrots, peeled, trimmed -- coarsely chopped 2 Celery, stalks, trimmed, -- coarsely chopped 1 Leek, trimmed, halved -- lengthwise, coarsely -- chopped, (wh