Creamed Potatoes au Gratin

3 Medium-sized potatoes (abt. 1 lb.)
onion to taste
salt & pepper
1 c. whipping cream, heated
(may need some regular milk)
1/3 c. fresh grated parmesan cheese
2 tbsp. fine italian bread crumbs
1/4 c. melted butter
Peal and slice potatoes. Cook potatoes and onion in gently boiling water until tender, drain. Arrange potatoes and onions in shallow baking dish. sprinkle with salt & pepper. Drizzle melted butter over potatoes and onion. Then drizzle cream over mixture to barely cover the top. At this point I often need to add a bit of milk to achieve my result. Combine cheese and crumbs and sprinkle over the potatoes. Bake 350 degrees untilmost of the cream os absorbed and the top is golden. App. 30 min.