Cheese and Potato Pierogi with Fried Leeks - Potato Goodness

Ingredients

• 2 tablespoons butter
• 1 leek, white and green parts, cleaned and diced
• 10-12 medium-size red potatoes
• 1 cup farmer cheese (or other mild, soft, white cheese)
• ¼ cup milk of choice (fat content does not matter)
• 1 ½ cups flour (+ additional for rolling)
• ½ teaspoon salt
• 2 large eggs
• 1 cup sour cream
• 1 leek, white and green parts, cleaned
• ¼ cup vegetable oil