Cut venison to 1.8-inch thick. Pound once with a meat mallet. Place the venison in shallow dish. Mix together the garlic, curry paste, turmeric, cumin, ginger root, coconut cream, fish sauce, and sugar. Pour over the venison and leave to marinate for about 2 hours.
Meanwhile, make the sauce. Heat the coconut milk over medium heat, then add beef stock, peanut butter, curry paste, fish sauce, tamarind juice, and brown sugar.
Cook stirring constantly, for about 5 to 6 minutes, until smooth. Add salt to taste.
Thread meat onto skewers. Brush with oil and cook on a hot grill for 30 seconds on each side, until cooked and golden brown.
Serve with the peanut sauce and garnish with red pepper flakes and peanuts.