Arabic Kitchen - Oven-roasted lamb shoulder

Recipe ingredients:

For the marinade:

Small lamb shoulder (one and a half kilograms)3 tablespoons olive oilA teaspoon of ground cuminA teaspoon of ground corianderA teaspoon of smoked paprikaA teaspoon of ground red pepperA teaspoon of ground black pepperA teaspoon of onion powderA teaspoon of brown sugarA tablespoon of tomato sauceA tablespoon of pepper molassesA teaspoon of turmericA tablespoon of Worcestershire sauce4 cloves of crushed garlicTwo teaspoons salt (to taste)A teaspoon of chopped rosemaryA cup of meat or vegetables as desired