In a small bowl, whisk together lemon juice, oil, salt, and pepper.
On a rimmed baking sheet, toss asparagus in lemon juice mixture until well coated. Arrange asparagus on pan in a single layer. Bake until asparagus are crisp-tender and starting to brown, about 5 minutes. Sprinkle with Parmesan and walnuts and bake for 2 minutes more. Serve immediately.
Recipe by Southern Lady Magazine at https://southernladymagazine.com/asparagus-with-lemon-and-parmesan-recipe/