Creamy Portabella Mushroom Soup — South Mill Mushrooms Sales

Ingredients

• ¼ cup unsalted butter
• 5 cups South Mill Champs portabella mushrooms, sliced and divided
• 3 cloves garlic, minced
• ¼ tsp sea salt
• 1 yellow onion, diced
• 1 can cream of mushroom soup
• 5–6 tablespoons of plain Greek yogurt (optional)
• ¼ cup chicken stock, if needed
• Fresh oregano leaves, torn
• ¼ tsp freshly ground black pepper