1. Center a rack in oven and heat to 375 degrees. Place pie shell on a baking sheet and let thaw 15 minutes at room temperature. Bake 10 minutes, then let cool slightly.
2. Meanwhile, saute asparagus until softened and let cool. Whisk eggs, milk, salt, and pepper until blended, then stir in asparagus, cheese, and onions and pour into parbaked crust.
3. Return to oven and bake until center is just set, 30 to 40 minutes. Let cool at least 15 minutes before slicing.
Source: Hannaford fresh Magazine, March-April 2021