Ingredients
Equipment
Method
- Preheat the oven to 400°F. Line one large or two smaller baking sheets with foil. Toss spinach with olive oil to coat and spread out on the baking sheet(s). Season lightly with salt.
- Roast spinach about 10 minutes, until completely wilted and a few pieces are browning. Remove and let cool slightly. Squeeze out any extra liquid and chop.
- Warm 1 tablespoon olive oil and the butter in a medium saucepan over medium-high heat. Add the onion and rice and cook, stirring frequently, for 1 to 3 minutes, until edges of rice turn slightly translucent. Stir in 1½ teaspoons kosher salt, black pepper to taste, ground red pepper, and 4 cups of water. Bring to a boil, reduce heat to low, cover, and simmer without stirring for about 15 minutes, until rice is al dente and most liquid is absorbed (the mixture will be creamy).
- Remove from heat and stir in the Parmigiano and cheddar cheeses, and then the chopped spinach. Taste for seasoning. Set aside until cool enough to handle comfortably, about 45 minutes.
- To make the balls, moisten hands with water. Form about 2 tablespoons of cooked rice into a thick disk, then press one mozzarella piece into the center. Shape so the rice completely encloses the cheese (adding more rice if needed) and squeeze to make a compact ball. Roll in panko and repeat with remaining rice.
- Heat vegetable oil in a heavy-bottomed, deep-sided pan (such as a Dutch oven) to 350°F to 355°F. Working in batches of 5 balls at a time so as not to crowd the pan, gently lower the balls into the oil and fry, turning once or twice, until deep golden brown, 3 to 4 minutes. (If browning too quickly, lower heat slightly). Drain on paper towels. Repeat with remaining balls.
Notes
Arancini can be made ahead and frozen. To reheat, place on a wire rack over a baking sheet and heat 30-40 minutes in a 350°F oven until hot all the way through.