Onion Parmesan Gratin

Directions

1. 1
   Slice the onions in half lenghwise, then cut crosswise into thin slices.
2. 2
   In a large skillet melt butter, then add in onions, thyme, cloves, pepper and salt; cover with lid and saute until the onions are very soft (about 10-12 minutes) adjust the salt to taste (do not add in too much salt as the Parmesan is salty!).
3. 3
   Transfer the onions to a buttered gratin dish or small casserole dish and smooth it out with a spoon.
4. 4
   At this point you can cover and let sit at room temperature to broil later.
5. 5
   Preheat the broiler.
6. 6
   In a small bowl whisk together egg yolks and whipping cream, the stir in Parmesan cheese.
7. 7
   Pour the mixture over the onions in the baking dish.
8. 8
   Place under the broiler (about 2-inches from heat).
9. 9
   Broil until the top is golden.
10. 10
    Serve immediately.