From the Kitchen of Crystal Kinnard, Mableton, GA. "Blanch peas in boiling salted water until crisp-tender. Then plunge into ice water."
Whisk together lemon juice, Dijon mustard, garlic, salt, sugar, and black pepper. Whisk in olive oil until smooth. Add sweet peas, snow peas, and sugar snap peas. Add radishes. Toss gently to coat.