Easy Oven Jerky

1/2 c Soy Sauce
1/2 c Worcestershire Sauce
2 tb Ketchup
1/2 ts Pepper (more for hot)
1/2 ts Garlic Powder
1/2 ts Onion Salt
1 lb Beef Roast

Marinate 1 hour or overnight. Bake in oven 150 to 170, overnight for 10 -12 hours.