Step 1

Preheat oven to 450 degrees F. Unroll pie crust and place in a 9-inch pie plate and flute edges. Bake 8 to 10 minutes or until light golden; set aside. Reduce oven heat to 350 degrees F.

Step 2

Meanwhile, in a medium skillet over high heat, melt butter. Add onions and saute 5 minutes. Reduce heat to medium-low, cover, and sauté 4 additional minutes, or until tender. Place onions in pie crust.

Step 3

In a medium bowl, whisk eggs, sour cream, dry mustard, salt, and pepper; mix well and pour over onions. Sprinkle with paprika.

Step 4

Bake 40 to 45 minutes or until a wooden toothpick inserted in center comes out clean and crust is golden. Let rest 10 minutes before cutting into wedges and serving.