Begin by preheating your oven to 400°F (200°C) and preparing the asparagus by trimming away the woody ends from the bottom of each spear. While the oven heats, prepare the marinade in a shallow dish by combining 2 tbsp of olive oil, 2 tsp of white wine vinegar, 3 crushed garlic cloves, a pinch of salt, and plenty of black pepper.
Whisk these ingredients together to create an aromatic base. Take the 1¼ lb (625g) of asparagus and roll the spears in this marinade, guaranteeing they are well coated. Cover the dish and allow the asparagus to marinate for 15 minutes, which will infuse the delicate vegetable with the flavors of garlic and vinegar.
After marinating, prepare a plate and spread out the 3 oz (90g) of grated Parmesan cheese. Remove the asparagus from the marinade and carefully roll each spear in the Parmesan, coating them evenly on all sides.
Arrange the coated asparagus in a single layer in a large ovenproof dish, then pour any remaining marinade from the shallow dish over the top. This ascertains the asparagus stays moist during roasting and the garlic-infused oil creates a savory base.
Place the dish in the preheated 400°F (200°C) oven and roast for 10–15 minutes until the Parmesan coating is lightly browned and the asparagus is sizzling hot.
The cooking time may vary slightly depending on the thickness of your asparagus spears, so check for a light golden-brown color and tender texture. Once cooked, remove from the oven and garnish with fresh lemon wedges and flat-leaf parsley sprigs before serving hot as an elegant side dish.