In a saucepan over medium-high heat, cook butter and onion for 2-3 minutes or until onion is clear.
Add minced garlic and sauté for 1 more minute; remove from heat.
In a large mixing bowl, whisk together eggs, half and half, salt and pepper until well combined.
Fold in ¾ cup Swiss cheese, ¾ cup cheddar cheese, ham and cooked onion.
Pour mixture into thawed pie crust and place on a baking sheet.
Top quiche with remaining cheese.
Bake for 40-45 minutes, or until set.
Garnish with fresh parsley, if desired.
Notes
This recipe gives you a great foundation to start with and build off to cater to what your family likes to eat. Some of our favorite ingredients to add to a quiche include the following: ground sausage, chopped broccoli, shredded carrots, chopped peppers, and bacon bits.