Roast the sesame seeds in a pan without fat and remove. Heat the oil in a small pot. Break the noodles shorter and deep-fry them in portions. Take them out and let them drip off on kitchen paper.
Rinse fish, dab dry and cut into cubes of about 1 cm. Peel ginger and chop very finely. Squeeze lime and orange, measure approx. 1⁄8 l juice. Mix with soy sauce and ginger. Mix with the fish and marinate for approx. 15 minutes (see fig. 3 + 4 page 60).
Clean and wash spring onions and cut into fine rings. Wash mint, shake dry, pluck off leaves and chop. Halve avocados, remove seeds. Remove the flesh from the skin and cut into slices.
Mix fish with sesame, spring onions and mint. Season to taste with salt and pepper. Serve on the avocados. Add fried noodles and sprinkle with Sriracha as desired.