For the sauce, peel and finely dice the onion. Heat 1 tablespoon of oil. Sauté the onion in it until transparent, dust with flour and sauté briefly. Add stock, milk and cream while stirring, bring to the boil and simmer for about 10 minutes, stirring occasionally.
Roughly dice the cheese, add to the sauce and dissolve while stirring. Season to taste with salt, sugar and pepper. Scampi, except for the tail fin, peel and remove the intestines. Wash the scampi, dab dry and season with salt, pepper and lemon juice.
Clean and wash spring onions, shake dry and cut into thin rings. Wash and halve the tomatoes. Wash basil, shake dry, pluck leaves from the stems and chop. Clean, wash and dry shake the rocket and cut into small pieces according to size.
Finely slice the parmesan. Add basil, spring onions, except for something for the scampi, and tomatoes to the sauce and warm up slowly. In the meantime prepare the pasta in boiling salted water according to the instructions on the packet.
Heat 1 tablespoon of oil in a frying pan and fry the scampi for about 5 minutes, turning them over. Mix noodles, sauce and rocket and arrange on plates with the scampi. Sprinkle noodles with parmesan and sprinkle scampi with remaining spring onions.