Purple Potato Soup - Potato Goodness

Ingredients

• 7 1/2 lbs purple potatoes , peeled, quartered
• 3 1/2 lbs leeks, washed, chopped
• 3 1/2 lbs yellow onion, peeled, chopped
• 10 quarts chicken stock
• 10 cups half and half
• 6 cups Greek yogurt
• 1 cup lemon juice
• 1/2 cup vegetable oil
• 1/2 cup pomegrante seeds (for garnish)
• 8 Tablespoons toasted fennel seeds
• 4 Tablespoons salt
• 1 1/2 Tablespoons white pepper