Polish Sauerkraut and Mushroom Pierogi Recipe

Ingredients (14)

• 1 quart sauerkraut (chopped, rinsed, and drained)
• 2 tablespoons butter
• 1 small onion (finely chopped)
• 8 ounces button mushrooms (finely chopped)
• 1/4 teaspoon salt (or to taste, remembering that the kraut is salty)
• 1/4 teaspoon black pepper
• Optional: 1 egg (hard-cooked, finely chopped)
• 2 tablespoons sour cream
• 2 large eggs
• 5 tablespoons sour cream
• 3 tablespoons vegetable oil
• 1 teaspoon salt
• 3/4 cup chicken broth (or vegetable broth)
• 4 cups all-purpose flour