In a medium saucepan over high, heat 4 cups of water to a boil. Quickly blanch asparagus spears and fresh peas, 30 seconds to 1 minute. Immediately, place in ice water to chill. Drain and set aside. If using frozen peas, defrost in microwave.
Divide greens between 8 salad plates. Arrange asparagus spears, peas and sliced radishes on top of greens. Add one slice lemon to each plate.
Drizzle with Lemon Vinaigrette.
Lemon Vinaigrette
In a single-serve blender, combine olive oil, lemon juice, shallot, honey, salt and black pepper. Blend until smooth.