I had a tiny amount of farro in my pantry and odds and ends of different grades of brown rice, so I combined them. I like the contrasting textures and flavors of the rice and farro, infused with the flavor of the roasted pepper and the vinaigrette.
02Meanwhile cook the farro. Combine with 3 cups water and salt to taste in a medium saucepan, bring to a boil, cover, reduce the heat and simmer 45 to 50 minutes, until tender. Turn off the heat and allow the farro to sit in the hot water for another 15 minutes, then drain and place in a paper towel-lined bowl to cool.
03In a large bowl, combine the rice, farro, diced roasted pepper, diced cucumber, feta, basil, and thyme.
04In a small measuring cup or bowl, whisk together the sherry and balsamic vinegars, salt to taste, Dijon mustard and garlic. Whisk in the olive oil. Pour over the grain mixture, add freshly ground pepper, and toss the mixture well.
05Line individual salad plates or a platter with arugula. Top with the salad. Garnish, if desired, with more crumbled feta, and serve.