INGREDIENTS
•
2 large eggs
•
1/2 cup whole milk
•
1/4 cup sour cream
•
2 teaspoons kosher salt
•
4 cups all-purpose flour, divided, plus more for surface
•
1 tablespoon olive oil
•
5 ounces bacon, chopped
•
1 small shallot, finely chopped
•
1 pound mixed mushrooms, such as crimini, oyster, and maiitake, chopped
•
10 cups mature spinach leaves, coarsely chopped (from about 1 1/2 bunches)
•
Cornstarch (for dusting)
•
All-purpose flour (for dusting)
•
1 large egg, beaten to blend
•
Kosher salt
•
1/2 cup (1 stick) unsalted butter, divided
•
Caramelized onions and sour cream (for serving)
•
A 3 1/4-inch round cutter