For the ribbon noodle salad, cook the noodles according to package instructions until soft, rinse and drain.
Wash sugar snap peas and blanch in salted water for about 2 to 3 minutes. Rinse with cold water.
Mix sugar, vinegar, mustard, pepper and oil to a dressing. Stir 3 tablespoons into the sugar snap peas.
Cut the tomatoes into quarters, the spring onions into fine rings and the basil leaves into strips. Mix these ingredients with the rest of the dressing.
Arrange the sugar snap peas on plates and arrange the pasta salad in the middle.
Serve the tagliatelle salad with rolled beef ham.