Preheat oven to 375°F (190°C). Blind bake your pie crust: line it with parchment paper, fill with pie weights, bake for 15 minutes. Remove weights and bake for an additional 5–7 minutes until lightly golden. Let cool slightly.
While the crust cools, bake the bacon on a lined sheet pan at 400°F (200°C) for 15–20 minutes or until crispy. Drain on paper towels, then chop into bite-sized pieces.
Sauté the diced shallot in a skillet over medium heat with a touch of oil until softened and golden, about 3–5 minutes.
In a medium bowl, whisk together the eggs, heavy cream, nutmeg, salt, and pepper until fully combined.
Sprinkle the cooked bacon evenly into the baked crust, followed by the sautéed shallots and cheese blend. Pour the custard mixture over the top. Garnish with fresh chives if desired.
Bake for 35–40 minutes, or until the quiche is golden, the edges are set, and the center still has a slight jiggle.
Let rest for 15–20 minutes before slicing and serving.