1 large white onion, chopped
1 medium head garlic, peeled and chopped
1 small German potato, diced
salt and pepper to taste
Melt oil in a small saucepan over low heat. Saute onion in oil for 1 to 2 minutes. Stir in garlic and potato. Puree into saucepan juices. Heat through with electric mixer on low speed; keep warm.
To make puree combine cooked onions, garlic and potato and salt and pepper to taste. Stir gently and cold sauce. Remove from heat and reserve 3 cups for later.