Steakhouse Onion Rings

2 large red onions, cut into 1-inch rings
Shallow bowl of 2 cups milk whisked with 1 large egg
Shallow bowl of 1 cup flour mixed with 1 cup cornstarch and 1 teaspoon salt

Special Equipment: deep fryer or heavy-bottomed pot filled with 4 inches of vegetable oil heated to 365 degrees

Soak the onion rings in the milk mixture for a minimum of 30 minutes. Toss each ring in the flour mixture; repeat, dipping rings in milk and flour again. Fry in the hot oil until golden, about 5 minutes. Transfer to paper towels; season with salt.