Bacon & Cheese Potato Piroshki

2hr · 12 servings Watch my full video tutorial and get the printable recipe, all on my website here: https://tatyanaseverydayfood.com/cheese-potato-piroshki/ For Yeast Dough: 1 cup whole milk 1 tbsp dry active yeast 1 tsp salt 2 tsp sugar 1/3 cup unsalted butter, melted 1 large egg 3 to 3 1/2 cups all-purpose flour For Potato Filling: 2 lbs yellow or golden potatoes salt 1/2 cup butter 1/2 cup cream 2 tbsp butter 1 large sweet onion, diced 1 cup Canadian bacon, diced 2 green onions, diced; green parts only 3 tbsp fresh dill 1 1/2 tsp salt ground black pepper, to taste 2 1/2 cups grated mozzarella cheese For Frying: 3 cups canola oil