Step 1

Preheat the oven to 375 degrees Fahrenheit.

Step 2

In a medium skillet over medium heat, melt butter, then add onion and saute until it begins to caramelize and become fragrant (about 15 minutes). Add garlic and saute for 30 seconds. Transfer onion and garlic to a large mixing bowl.

Step 3

Replace the pan over the heat and add bacon. Fry until crispy, about 10-12 minutes. Place bacon on paper towels to absorb the excess grease.

Step 4

Crack open eggs into the bowl with the onion and garlic, then pour in heavy whipping cream. Whisk together until fully combined.

Step 5

Crumble bacon into the bowl, then add the cheeses and mix. Pour the mixture into a round 9-inch pie dish or similarly sized pan. Bake for 20 minutes. When done, the egg mixture should be set, but not overly firm. Let cool for 15 minutes before slicing and serving.