Rub the corn with 1 teaspoon olive oil and grill until lightly charred, about 5-7 minutes. Let the corn cool slightly before slicing the kernels off the cob.
In a small bowl, whisk together the lemon juice, rice wine vinegar, garlic, salt, pepper and the remaining olive oil.
In a large bowl, combine the corn, edamame, tomatoes, onions, bell peppers. Stir in the lemon vinaigrette. Taste and add more salt and pepper if necessary.