I got this recipe from a newspaper a few years ago, made it and been making it ever since. If you love your greens, you'll love this salad. I have also used other greens on different occasions.
Your choice on how much mustard you use......... 1 or 2 teaspoons.
Remove woody ends from asparagus and cut into equal lengths.
Cook the peas and aspragus in boiling salted water for around 2 minutes or until just tender but still crisp. Do not overcook them and when removed from water refresh them in a bowl of iced cold water. Drain, pat dry and place into a bowl with rocket, spinach and celery.
Combine the dressing ingredients, add salt and pepper to taste and mix well through. Pour over salad, and toss.