Grilled Chicken Drumsticks

Ingredients

• 1/2 cup (4 oz or 125 g) ketchup
• 2 tablespoons (1 fl oz or 30 ml) olive oil
• 2 tablespoons (1 fl oz or 30 ml) white wine vinegar
• 2 tablespoons (1 fl oz or 30 ml) Worcestershire sauce
• 2 tablespoons (10 g) brown sugar
• 3 (3 g) cloves garlic, chopped
• 1 tablespoon (3.5 g) fresh rosemary, chopped
• 8 (5 oz or 150 g) chicken drumsticks
• salt and freshly ground black pepper