Preheat oven to 375C. Saute onions, mushrooms, and garlic in olive oil with kosher salt and fresh pepper, until softened. Place a layer of potato slices in the bottom of a buttered 9x13 in baking dish, overlapping slightly.
Spread half of onion and mushroom mixture and half of bacon over the potatoes, top with another layer of potatoes; repeat.
Add kosher salt, fresh pepper, and nutmeg to the heavy cream; bring to a simmer. Pour over potatoes until just covered.
Cover baking dish with foil, and bake for 40-45 minutes, or until potatoes are tender (pierce with a fork.).
Remove foil and top with cheese, and sprinkle with thyme. Bake for another 30-35 minutes to brown.
Broil for a few minutes, if desired. Let stand for 10-15 minutes before serving.
Comments:
Humaari sowna didi toh sub basht banaati hain!