PAR BAKE CRUST: Preheat oven to 375°F. Bake unwrapped frozen pie crust on baking sheet for 10 minutes. Then, remove from the oven and let cool briefly.
ONION AND GARLIC: Melt the butter in a nonstick pan over medium-high heat. Add in diced onion and cook 3-5 minutes or until soft and translucent. Add garlic and stir until fragrant, about 30 seconds. Remove, set aside, and allow to cool slightly.
EGGS, HALF & HALF, SEASONINGS: Whisk eggs in a large bowl until lightly beaten. Whisk in half-and-half, Italian seasoning, and salt/pepper to taste (I add 3/4 tsp salt & 1/4 tsp pepper.
HAM & CHEESE: Gently stir in cubed ham and both cheeses. Stir in the cooked onion and garlic.
BAKE: Leaving pie crust on baking sheet, carefully pour filling into crust (don't over-fill; discard extra if needed). Bake on the lower oven rack for 35 to 42 minutes, or until set and very slightly jiggly in the center.
SERVE: Serve warm with optional garnishes as desired.
Video
Notes
Note 1: Use leftover cooked holiday ham or store-bought.