one pan farro with tomatoes

Name: one-pan farro with tomatoes
Ingredients: 2 cups water; 1 cup (updated) semi-pearled farro (see Note above for farro types); 1/2 large onion (I usually use a white one, for mildness); 2 cloves garlic; 9 ounces grape or cherry tomatoes; 1 1/4 teaspoons kosher or coarse sea salt; Up to 1/4 teaspoon red pepper flakes (to taste); 1 tablespoon olive oil, plus extra for drizzling; Few basil leaves, cut into thin ribbons; Grated parmesan cheese, for serving (optional)