This recipe was adapted from Simply in Season.

For the crust, mix together in pie pan:
3 c. shredded potato or celeriac
3 tbsp. olive oil
Press into shape and bake at 425 for 15 minutes or beginning to brown.
While the crust is baking, beat together:
3 eggs
1 c. milk or evaporated milk
¼ tsp salt
¼ tsp. pepper
1 tsp. dried parsley
Arrange on baked crust, in order given:
¼ c. onions, chopped
1 c. cheese, shredded
1½ c. asparagus, steamed and chopped or 1 bunch greens, chopped and sautéed
½ c. cooked bacon or ham, chopped or sautéed mushrooms (optional)
Pour egg-milk mixture on top. Bake at 425 for 15 minutes. Reduce heat to 350 and bake until browned on top and set in the middle, another 25-30 minutes. Allow to cool for 10-15 minutes before serving.