Slow-Cooker Garlic-Rosemary Cauliflower Puree

Ingredients

• 2 tablespoons butter, melted
• 1 medium onion, chopped
• 1 large head cauliflower, cut into florets
• 1 package (6-1/2 ounces) spreadable garlic and herb cheese
• 1/2 cup grated Parmesan cheese
• 1/2 teaspoon Montreal steak seasoning
• 1/4 teaspoon pepper
• 1 teaspoon minced fresh rosemary or 1/2 teaspoon dried rosemary, crushed
• 1/4 cup heavy cream, warmed
• Optional: Additional minced fresh rosemary and pepper