Defrost peas at room temperature. Put the pasta in plenty of boiling salted water and cook over medium heat for about 10 minutes. Then drain, rinse well, drain well and allow to cool. Pour the beans onto a sieve, rinse and drain well. Drain the corn and let it drain. Peel onion and chop roughly. Clean, wash and halve the cherry tomatoes as desired.
For the vinaigrette, mix stock, vinegar, mustard, salt, pepper and sugar. Whip the oil into the vinaigrette. Mix the pasta, tomatoes, corn, beans, onion and peas and pour the vinaigrette over it. Let the salad steep a little. Wash the chives, dab dry and cut into small rolls. Serve the salad in a bowl sprinkled with chives and garnished