Wash the asparagus, peel the lower third and cut off the woody ends. Cut asparagus into bite-sized pieces, cook in boiling salted water for about 5 minutes and drain. Peel onions, cut into fine slices.
Peel the garlic and press it through a garlic press. Heat 2 tablespoons of oil. Fry onion slices, garlic and rice in it until transparent. Deglaze with white wine. Season with salt, pepper and saffron. Add stock, bring to the boil.
Cook for about 20 minutes, stirring several times. Wash the scampi and dab dry. Wash lemon and cut into slices. Grate parmesan. Clean, wash and roughly chop the rocket. Heat 2 tablespoons of oil. Fry the scampi and lemon wedges for about 4 minutes.
Season with salt and pepper. Stir asparagus, scampi, rocket and parmesan into the risotto. Serve in portions garnished with fried lemon wedges.