Preheat oven to 425 F. (220 C.) Slice the stiff ends off of 1 bunch of asparagus.
Slice 1 lemon into 6 slices.
Mix together ½ tsp. dry garlic flakes and ½ tsp. lemon pepper.
Melt 2 tbsp. salted butter and drizzle over asparagus. Either use your hands or a mixing spoon to make sure every stalk of asparagus is completely coated. Gently massage into the tips.
Lay asparagus down onto a foil-lined baking sheet and sprinkle with half of the lemon pepper-garlic spice blend.
Place 6 lemon slices right on top of the asparagus and bake for 10-12 minutes. You’ll know it’s done when you see the tips are perfectly crispy.