Slice your beef into really thin slices. As thin as possible works best in to 2 - 4 inch long pieces (like the size of jerky you'd buy in the shops)
500 g Lean beef
Mix all the marinade ingredients together in a bowl and put in your beef slices. Pop in the fridge for at least 24 hours.
175 ml Teriyaki Sauce, 175 ml BBQ sauce, 75 ml Worcestershire sauce, 1.5 tsp Garlic Pepper, 1.5 tsp Onion Powder, 0.5 tsp Salt or Cure
Set the smoker to burn low and slow. You don't want to cook the meat but you want to be drying out. The ideal temperature is 150F or 65C. Regarding smoke, have the burn smoke the meat in the first hour or so for it to absorb the smoke flavour.
Place the pieces of marinaded beef on the smoker. Both levels and leave on for at least 5 hours. Keep an eye on the temperature. You don't want to cook it - just dry it out.
The jerky should be ready after about 5 - 6 hours. It will be dry and chewy, but not burnt. This can be stored in the freezer for up to 6 months (if it lasts that long!!!)