Korma Sauce from Tajikistan

Ingredients
1 med. Yellow Onion 3 cups Water 16 ounce can Tomato Sauce 1 tsp Salt 1 1/2 tsp Coriander 1 tbl Corn Oil 1/4 tsp Black Pepper

Directions

 * 1) Slice yellow onion very thin and boil it in water for about 15min. or until the onion becomes tender.
 * 2) Next, strain the water and put the onion in a blender with corn oil, tomato sauce, salt, black pepper, and freshly ground coriander.
 * 3) Blend this mix well and then put the sauce into a saucepan and bring to a boil.
 * 4) Aftre it comes to a boil, turn the heat down to low and let the sauce simmer until it thickens.