Farro Risotto with Greens and Feta

Name: Farro Risotto with Greens and Feta
Ingredients: 4 tablespoon olive oil; 1 onion, finely chopped, to yield a heaping cup; 4 cloves garlic, minced; 1 cup pearled farro; 3 to 4 sprigs thyme; 1/2 teaspoon smoked paprika; 1 bay leaf; 4 strips of lemon peel; pinch crushed red pepper flakes; 1 26-oz box or 28-oz can crushed tomatoes, see notes above; 3 cup water; kosher salt and pepper to taste; 5 ounce kale or chard, leaves removed from stems, finely chopped (about 4 packed cups); 6 ounce feta, preferably in brine, cut into 1/2-inch cubes