02Add 2 cups vegetable broth and bring to a brisk simmer. Cook until liquid is nearly evaporated, about 5 minutes. Continue adding broth 1 cup at a time and cook in the same fashion until rice is just done and all liquid is absorbed (it should take 4 to 5 cups broth), about 10 minutes. Turn off heat and stir in Parmesan, Fontina and lemon zest and juice. Taste and adjust seasoning (rice should be well seasoned). Stir in chives, then spread mixture on a baking sheet or platter to cool. Cool for at least 2 hours (or refrigerate overnight, covered).03With a spoon, divide mixture into 12 pieces. Shape each piece into an oval patty. Roll patties lightly in flour to coat. Pour olive oil to a depth of 1/2 inch into a cast-iron skillet and place over medium heat. Dip floured rice patties briefly into beaten egg, then fry gently on both sides until browned. Drain on paper towels. Serve hot, sprinkled with more Parmesan and chives if desired.