Make the dressing: Put all ingredients except oil in a blender. Turn on the blender and bring up to high speed. While it is running, add in the oil in a slow steady drizzle until it forms a nice emulsion.
Toss all ingredients in a bowl and coat evenly with dressing. You probably won't need all the dressing. Alternatively, assemble the salad so all ingredients can be seen and serve the dressing on the side.
Keyword avocado, Edamame, feta, Mother's day, salad, spring