Ingredients:1 small onion1 pound red beets with greens (about 3 medium)4 cups water1/2 stick (1/4 cup) unsalted butter1 cup Arborio or long-grain rice1/2 cup freshly grated Parmesan (about 1 1/2 ounces)1 tablespoon bottled horseradish Directions:Finely chop onion and trim stems close to tops of beets. Cut greens into 1/4-inch-wide slices and chop stems. Peel beets and cut into fine dice. …