Defrost the peas. Cook the pasta in boiling salted water according to the instructions on the packet. Boil eggs in boiling water for about 10 minutes until hard. Peel, wash and cut carrots into sticks. Cook in little boiling salted water for about 5 minutes. Cut cucumbers into slices.
Mix yoghurt, mayonnaise and lemon juice. Season with salt, pepper and sugar. Drain the pasta, quench and drain. Drain eggs, quench, peel and cut into eight pieces. Drain carrots on a sieve. Mix the salad ingredients with the salad cream. Season again. Wash the tomatoes, grate dry and cut into quarters. Fold into the salad. Put the lettuce in a bowl. Wash parsley, pluck leaves from the stalks and chop. Sprinkle over the lettuce.
Season again. Wash the tomatoes, grate dry and cut into quarters. Fold into the salad. Put the lettuce in a bowl. Wash parsley, pluck leaves from the stalks and chop. Sprinkle over the lettuce. Heat the sausages and serve with the pasta salad. Serve with mustard and ketchup