Directions
- 1Peel the sweet onions.
- 2Slice the onions thinly on a mandoline, about a quarter of an inch thick.
- 3Toss the sliced onions together in a bowl to break up all the rings.
- 4Combine salt, black pepper, smoked paprika, granulated garlic, dry mustard, brown sugar, cayenne pepper, and fresh thyme leaves in a small bowl.
- 5Mix the spices together with a fork.
- 6Add olive oil to the sliced onions and toss to coat.
- 7Sprinkle about half of the spice mixture over the onions and toss with your hands to distribute.
- 8Sprinkle the remaining half of the spice mixture over the onions and toss again.
- 9Grease a 13x9 baking dish.
- 10Place a layer of seasoned onions on the bottom of the baking dish.
- 11Sprinkle 2 ounces of freshly grated Tillamook mild cheddar cheese over the onion layer.
- 12Sprinkle 2 ounces of freshly grated Gruyere cheese over the onion layer.
- 13Add another layer of seasoned onions on top of the cheeses.
- 14Sprinkle another 2 ounces of Tillamook cheddar cheese over the second onion layer.
- 15Sprinkle the remaining 2 ounces of Gruyere cheese over the second onion layer.
- 16Sprinkle about a half cup of freshly grated Pecorino Romano cheese on top.
- 17Dot the top with 3 tablespoons of butter, cut into small pieces.
- 18Tightly cover the baking dish with foil.
- 19Bake in the oven at 350 degrees Fahrenheit for 45 minutes.
- 20Remove the foil and bake for another 30 minutes until golden brown and bubbly.
Ingredients
- 3 pounds sweet onions
- 2 teaspoons salt
- 1 teaspoon black pepper
- 1 teaspoon smoked paprika
- 1 teaspoon granulated garlic
- 1 teaspoon dry mustard
- 2 teaspoons brown sugar
- 0.5 teaspoon cayenne pepper
- 1 teaspoon fresh thyme leaves
- 2 tablespoons olive oil
- 4 ounces Tillamook mild cheddar cheese
- 4 ounces Gruyere cheese
- 0.5 cup Pecorino Romano cheese
- 3 tablespoons butter
Equipment
mandolinebowlfork13x9 baking dishfoil
Tips
- It is important to slice the onions uniformly and thinly (about 1/4 inch thick) so that they melt and are silky, not crunchy.
- You can use either light or dark brown sugar.
- You can use sharp cheddar cheese if you prefer.
- You can use Parmesan Reggiano or Grana Padano instead of Pecorino Romano cheese.
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