Mushrooms “En Brochette”

• 36 button mushrooms (about 2 pounds)
• 6 tablespoons melted butter

Clean mushrooms; remove stems (saving them for another use) and place 6 mushroom caps on each of 6 metal skewers. Combine melted butter and olive oil, and flavour to taste with lemon juice, salt, freshly ground black pepper, garlic and rosemary. Brush mushrooms with this mixture. Grill over charcoal or under the grill, turning mushrooms so as to brown them on all sides, and basting from time to