To make the dressing, place the oil, maple syrup (or honey) , rice vinegar, miso, mustard, shallot or onion, garlic, lemon juice, salt, and pepper in a small bowl. Whisk to combine. Add the chives and set aside.
In a salad bowl, place the arugula, green beans, red onion, and cherry tomatoes. Whisk the dressing again and drizzle over the vegetables. Toss to combine.
Serve chilled or at room temperature.
To add some protein and bit of spice consider garnishing the salad with our Spicy Roasted Chickpeas https://veggiefestchicago.org/recipe/spicy-roasted-chickpeas/