Plugrà - Grilled Mushrooms with Rosemary Lemon Basting Butter

Ingredients

• 4 tbsp. Plugrà® unsalted butter
• 1 tbsp. soy sauce
• 2 tsp. minced fresh rosemary
• 1 tsp. minced garlic
• 1 tsp. grated lemon zest
• 1 tsp. pepper, divided
• 1 lb. white, cremini, shiitake, portobello, oyster, maitake, and/or king oyster mushrooms, at least 2 inches wide
• ½ tsp. vegetable oil
• ¼ tsp. table salt