Alsatian Quiche with Bacon and Caramelized Onions

Name: Alsatian Quiche with Bacon and Caramelized Onions
Prep time: 40 min
Cook time: 50 min
Total time: 1 h 30 min
Cuisine: French
Ingredients: 1 refrigerated pie crust; 4 strips thick-cut bacon; 1 tablespoon butter; 2 medium yellow onions, (halved and thinly sliced); 3 eggs; 1½ cups half & half; 1 teaspoon kosher salt, (divided); ¼ teaspoon freshly ground pepper; Pinch of freshly grated nutmeg; ½ cup shredded Gruyere cheese