Grilled sausage, green beans and potatoes - a great new way to cook beans and potatoes

1 lb fresh green beans, trimmed
1/2 lb red potatoes
1/2 onion sliced
1 lb somked sausage, sliced
s and p
1 teaspoon veg oil
1 tablespoon butter

preheat grill to high. Toss first 6 ingredients in a large bowl. Place on a large sheet of foil. Dot with butter. Add 1/3 cup water. Wrap tightly, and grill for 10 to 12 minutes on each side.

From Allrecipies.com