Potatoes Au Gratin

2 lb. Yukon Gold potatoes
1/4 c. soy butter
1 medium onion chopped
1 tbl. whole wheat flour
salt and pepper
1 c. rice milk
1/2 c. fat-free plain yoghurt
1/2 c. yoghurt with Wholefoods ranch dressing seasoning mix
2 c. cheese grated (combined): .75 oz mustard cheese, white Cabot cheddar
paprika

Heat oven to 375.
Slice potatoes approximately 1/8 of an inch thick. Spread potatoes evenly into an ungreased casserole dish.

In a pot, melt butter and cook onions for about 2 minutes (until golden). Stir in flour, salt and pepper. Cook, stirring constantly, until bubbly. Remove from heat.

Stir in rice milk, yoghurt, dip, and 1.5 cups of cheese. Heat to boiling and cook, stirring, for 1 minute.

Pour cheese sauce over potatoes. Divide one-fourth of a cup of rice milk and pour into each corner of the casserole dish.

Bake 45 minutes, uncovered.
Sprinkle remaining cheese over potatoes and cook an additional 15-20, until brown.