Ingredients
- 2 1/4 cups all-purpose flour, plus extra for dusting
- 1 teaspoon kosher salt, plus more as needed
- 1 large egg, beaten
- 1 cup sour cream, plus more for serving
- 6 tablespoons unsalted butter, softened, divided
- 1 large yellow onion, thinly sliced
- 3 tablespoons canola or vegetable oil, divided, plus more as needed
- 10 ounces thinly sliced steak, such as ribeye or top round (see note above)
- Freshly ground black pepper
- 1 1/2 cups shredded provolone cheese
- 1 cup shredded low-moisture mozzarella cheese
- Chopped flat-leaf parsley, to garnish
Personal Notes
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