Yam and Apple Casserole

6 medium yams
3-4 apples, peeled, cored, and sliced
1/2 C butter
3 TBSP cornstarch
1 C sugar
1 tsp salt
2 C water
2 TBSP lemon juice

Parboil yams for about 20 minutes. Cool, peel, and slice. Layer in buttered casserole dish, yams then apples.
melt butter in saucepan, add cornstarch, sugar, and salt. Blend well. Add water, cook and sitr until thickened. Add lemon juice, then pour over yams.
Bake at 350 degrees for about 1 hour. Serves 8.