Parsnip Gratin with Gruyere and Thyme
1 lb Parsnips 1 small yellow onion 3 Cups heavy whipping cream Butter, for greasing the pan 1/4 tsp ground nutmeg 1/4 tsp pepper 1 1/4 tsp kosher salt 1 tablespoon fresh Thyme or rosemary, finely chopped 1 tablespoon all purpose flour 3 large minced cloves garlic 1 generous cup grated gruyere cheese OR swiss cheese Preheat oven to 400 F Peel Parsnips. Using a mandolin, slice parsnips to 1/8 thin slices. The thinner the slices the better. If you donâ€™t have a mandolin, slice them as thinly as possible. Thinly slice the onion and grate the cheese. Generously grease a 9 x13 inch baking dish with butter. Layer the parsnips and onion and 1/2 of the cheese and 1/2 of the thyme, reserving the bigger pieces of parsnips for the final layer. Press down and make sure layers are even. Itâ€™s OK if the inside layers are messy. Place the last layer of parsnip slices in nice looking overlapping rows. In a small pot heat 3 Cups whipping cream. Whisk in salt, nutmeg, the remaining thyme, white pepper, flour and the garlic and when it just comes to a simmer, pour over the layered parsnips, slanting the baking dish to get the cream in all the nooks and crannies. Sprinkle the remaining cheese over the top, a few more leaves of thyme and a little sprinkling of nutmeg. Cover securely with a lid or foil and bake for 50 minutes on the middle rack. Remove foil, pierce with fork, parsnips should be al dente. (If not- your parsnips were perhaps cut thicker that 1/8 of an inch, and you may need to cook longer with the foil on) Donâ€™t worry if it seems watery at this point, bake another 15 minutes uncovered, or until golden and bubbly. It is important to let it sit at room temp for 15-20 minutes before serving, so it sets and thickens.