Indonesian sate' shrimp

2 tb Peanut oil
      1 sm Onion,minced
      2    garlic cloves,minced
      3 tb Peanut butter
    1/4 c  Lemon juice
      1 ts Turmeric
      1 ts Chili powder
      2 ts soy sauce
  1 1/3 c  chicken stock
      1 tb Cornstarch
      2 tb Water
    1/4 c  Sour cream
      4    Dozen medium shrimp,shelled
           -and deveined
 
  Sauce:
  
  Wood or metal skewers Rice
  
  Saute onion and garlic in oil until onion is limp,about 10 minutes.
  Add the rest of ingredients and simmer for one minute,stirring
  constantly.The mixture will be quite thick.Let cool.Mix shrimp and
  cooled Sate' Sauce in a small bowl.Cover and let stand at room
  temperature for 30 minutes to one hour or refrigerate for 2 to 3
  hours If you marinade in refrigerator,remove one hour before
  cooking.Save sauce. Skewer shrimp the long way so that they will lie
  flat on grill or broiler pan.Preheat broiler 5 to 10 minutes.Put
  shrimp on grill or in broiler and cook 10 minutes per side until each
  side is browned, turning only once. Using 2 tbsp. of marinade,mix
  with 1 1/2 cups of chicken stock.Bring to a boil and thicken with 1
  tbsp. of cornstarch,mixed with 2 tbsp. of water.Stir in 1/4 cup sour
  cream and serve over rice.