Preheat oven to 400 degrees F.
Line a Jelly Roll Pan (10x15) with foil and lightly spray with cooking spray. Add asparagus and drizzle with 1 tablespoon olive oil. Add 1 minced garlic clove, 1/4 teaspoon salt and 1/8 teaspoon pepper. Toss until evenly coated then line asparagus in a single layer. Roast for 4-6 minutes depending on thickness.
Meanwhile, remove tails from shrimp.
Remove pan from oven and push asparagus to one side of the pan (keep in a single layer). Add shrimp and drizzle with 1 tablespoon olive oil. Add 2-3 minced garlic cloves (or more to taste), 1/2 teaspoon salt, 1/4 teaspoon paprika, 1/8 teaspoon pepper, 1/8-1/4 teaspoon red chili flakes and fresh parsley. Toss until evenly coated then line shrimp in a single layer.
Top asparagus with 1 tablespoon cubed butter, evenly spaced. Top shrimp with 2 tablespoons cubed butter, evenly spaced. Roast for 6 minutes or just until shrimp is opaque.
Remove pan from oven and drizzle with lemon juice. Season with additional salt and pepper to taste. Serve with pasta, rice, etc.