Place the edamame in the bowl of a food processor (or high-powered blender) and pulse a few times. Add the lemon juice, soy sauce, hoisin, ginger, garlic, and salt, and process for 1 minute, scraping down the sides of the bowl a few times, until relatively smooth. With the motor running, slowly pour in the olive oil and continue processing for another minute until the dip becomes uniform and slightly fluffy.