Recipe For Potato Leek Soup Slow Cooker. Cover and cook on low for 8 to 10 hours. In a large slow cooker melt butter on high.
Add the leeks and saute until softened stirring frequently and very lightly browning 5 to 7 minutes. Cover and cook on low for 7 to 8 hours or until the potatoes are tender. Add evaporated milk and cheese if used in the last 30 minutes.
Swish them around to dislodge dirt and sand.
Add the leeks and saute until softened stirring frequently and very lightly browning 5 to 7 minutes. Add the leeks and saute until softened stirring frequently and very lightly browning 5 to 7 minutes. Slice the leeks and place in a bowl of water. Slice remaining portion of leek.