Step 1

Preheat oven to 375 degrees.

Step 2

In a pan on medium heat, melt butter. Once bubbling, add onions. Sautee until translucent and remove from heat/set aside, allowing to cool.

Step 3

In a large bowl, whisk eggs for about 30-45 seconds or until beaten. Whisk in heavy whipping cream, and dijon mustard.

Step 4

Stir in ham, both cheeses, parsley, salt/pepper, and onions to egg mixture.

Step 5

Pour egg mixture into pie crust. Bake on lower oven rack for 35-40 minutes, or until the quiche is set, and a knife comes out mostly clean.