Step 1

Combine 2 cups flour, sugar, salt, and yeast for dough in a large mixing bowl; stir until well combined. Cut in butter with a fork until mixture resembles coarse cornmeal. Add warm water and beat on medium speed for 2 minutes.

Step 2

Add eggs and 1 cup flour; mix until combined and thick. Stir in remaining 2 cups of flour, 1/2 cup at a time, until the dough comes together.

Step 3

Turn dough out onto a lightly floured surface and knead until smooth and elastic, about 8 minutes. Cover with a damp towel and let rest for 20 minutes. Punch dough down, cover, and let rise until double in size, 1 to 1 1/2 hours.

Step 4

While the dough is rising, cook bacon for filling in a large skillet over medium-high heat, stirring occasionally, until browned and crisp, 7 to 10 minutes. Remove bacon to a paper towel-lined plate. Drain and discard all but 1 tablespoon grease from the pan.

Step 5

Add onion to the bacon grease and sauté over medium heat until softened, about 5 minutes. Remove from the heat. Combine onion and bacon in a bowl, season with salt and pepper, and set aside until dough has risen.

Step 6

Preheat the oven to 350 degrees F (175 degrees C). Spray two large baking pans with cooking spray. Place beaten eggs in a bowl.

Step 7

Divide dough into 3 pieces, then divide each piece into about 12 balls. Roll each ball to pizza dough-thickness. Use a small spoon to scoop some onion-bacon mixture into the center. Brush egg wash on the dough around the filling, then fold the edges/corners up and over the filling. Place piragi in the prepared baking pans with the seams facing down, and brush the tops with egg wash.

Step 8

Place one pan in the preheated oven and bake for 5 minutes. Remove from the oven and brush the tops with more egg wash. Return to the oven and bake until golden brown, about 20 more minutes.

Step 9

Repeat to bake remaining piragi.