
Mix up your summer sides with this salty, crunchy, and herbaceous grain salad tossed in an Asian-inspired vinaigrette.
Whisk garlic, fish sauce, vinegar, sugar, and 1 tablespoon water in a small bowl until sugar dissolves.
Cook farro in a medium pot of boiling salted water, stirring occasionally, until tender, 20–25 minutes. Drain; transfer to a large bowl.
Heat oil in a large skillet over medium-high. Cook scallions, turning occasionally, until charred all over, about 4 minutes. Transfer to bowl with farro. Add both types of tomatoes, cucumbers, parsley, and tarragon and toss to combine. Add vinaigrette and toss again to coat; season with pepper.
Vinaigrette can be made 1 week ahead. Cover and chill.