1. Preheat your oven to 350°F (175°C). In a large skillet, melt the butter over medium heat. Add the sliced onions and cook, occasionally stirring, until they are caramelized and golden, about 20 minutes. Be patient; it’s worth it for the depth of flavor!
2. Spread the caramelized onions evenly into the bottom of your pre-baked pie crust.
3. In a medium bowl, whisk together the eggs, milk, and heavy cream until well combined. Stir in the grated cheese, salt, and pepper.
4. Pour the egg mixture over the onions in the pie crust. Sprinkle paprika on top for a pop of color and a hint of smokey flavor.
5. Place the pie on a baking sheet (just in case of spills) and bake for 40-45 minutes, or until the center is set and the top is lightly golden.
6. Let the pie sit for at least 10 minutes before slicing. This allows it to set and makes it easier to serve.
Variations & Tips:
– Feel free to play with the cheese! Try Gruyère for a nuttier flavor or pepper jack for a kick.
– Add some herbs like thyme or rosemary to the onions as they caramelize for an aromatic touch.
– Make it a bit lighter by using skim milk and reducing the amount of cheese.
– This pie can be made in advance and reheated; it’s a total lifesaver when you’re juggling work and meal prep for the week. Just warm it in the oven at 300°F (150°C) until heated through.
