Ukrainian Potato Dumplings - Potato Glory

Ingredients

• 1 lb. Colomba potatoes (4-5 potatoes), cut into cubes
• 8 tablespoons butter, divided
• ½ teaspoon kosher salt
• ½ teaspoon freshly ground black pepper
• 2 tablespoons extra virgin olive oil
• 2 medium onions, diced
• ¼ teaspoon kosher salt
• 3½ cups all-purpose flour
• ½ teaspoon baking soda
• 3 tablespoons sour cream
• ½ – 1 cup water at room temperature
• Fresh chopped parsley for garnish