You will need about 4-5 slices of bacon. I cut them and pan fried them until they were crispy. Then transfer them to a paper towel to drain and crumble them when they have cooled down. Set aside 1-2 Tbs of bacon drippings to use later. Discard the rest of the drippings.
You will need:
1 cup whole milk ricotta cheese
1/2 tsp salt
1 egg yolk
Fresh ground pepper - to taste
1/4 cup Parmigiano-Reggiano
1/3 of tsp of dried thyme or 1 tsp fresh thyme
Combine all together and set aside.
In a store bought frozen pie crust (or homemade if you prefer) spread the ricotta mixture evenly on the bottom of the pie crust.
Then spread the caramelized onions evenly on top of the ricotta mixture. Sprinkle with 1 Tbs of Parmigiano cheese.
Sprinkle crumbled bacon on top and bake in a 350 degree oven for 30-40 minutes or until the crust is golden brown. I suggest you allow it to cool for 20 minutes before serving.