Patti'S Roast Potatoes
["1/4 c. butter", "1/4 c. olive oil", "4 lb. potatoes, peeled and cut into 2-inch chunks", "1 large onion, cut into eighths", "8 cloves garlic, cut in half", "1/4 to 1/2 c. hazelnuts, coarsely chopped"]
["Put butter, oil, potatoes, onion and garlic into a 10 x 15-inch baking pan at least 2 inches deep.", "Spread vegetables evenly.", "Bake on bottom rack at 475\u00b0 for 30 minutes.", "Stir with wide spatula after 15 minutes."]
["butter", "olive oil", "potatoes", "onion", "garlic", "hazelnuts"]