Ingredients
Pizza Onions
2 tbsp. olive oil
2 large onions, quartered and thinly sliced
Salt
1 tsp. dried oregano
About 1/4 cup tomato paste
1 tsp. Calabrian chili paste or 1 tsp. crushed red pepper
½ cup red wine
1 cup chicken stock or water
Burgers
1 ½ lb. ground sirloin
Kosher salt and black pepper
½ cup fresh flat-leaf parsley, finely chopped
6 tbsp. butter, at room temperature
3 cloves garlic, finely chopped
Drizzle of olive oil
4 slices each provolone and mozzarella (from the deli counter)
4 Italian rolls or 4- to 5-inch pieces of soft Italian bread, split
Little Gem lettuce leaves, sliced tomato, and basil leaves, for serving
Directions
Step 1
In a large skillet, heat the oil, two turns of the pan, over medium. Add the onions; season with salt and the oregano. Cook, stirring often, until very soft, about 20 minutes. Add the tomato paste and chili paste and stir until coated, about 1 minute. Add the wine and stir until evaporated. Add the stock. Reduce heat to low. Let the pizza onions simmer while you make the burgers.
Step 2
Heat a large cast-iron skillet over medium-high.
Step 3
In a large bowl, season the beef with kosher salt and black pepper and mix together. Form into 4 patties (thinner in the centers for even cooking).
Step 4
In a small bowl, mix the parsley, butter, and garlic.
Step 5
Drizzle the patties with oil. Cook, turning occasionally, 7 to 8 minutes. Top with the garlic butter, then the cheeses. Tent with foil to melt the cheeses.
Step 6
Top the roll bottoms with lettuce, tomato, basil, and the cheeseburgers. Add the pizza onions and roll tops.