Put asparagus slices in a steamer basket placed inside a pot filled with about an inch of water. Bring water to a boil over high heat, lower heat, cover pot, and steam asparagus until just tender (2 to 6 minutes, depending on thickness of the spears).

Place asparagus in a serving bowl and let cool in the fridge.

While asparagus is steaming and cooling, combine lemon juice, salt, pepper, and sugar in a small bowl or a jar with a tightly fitting lid.

Add olive oil and whisk or shake vigorously until well combined. Taste and add salt, pepper, or sugar if needed.

Add onion, letting it marinate in the dressing for a few minutes.

Toss shrimp, basil, pine nuts, and cheese with the asparagus (reserving a little of the cheese to sprinkle on top after dressing).

Add the marinated onion and lemon vinaigrette to taste (you may have some vinaigrette left over).

Sprinkle remaining cheese on top.