Tennessee Onions | Cooking Professionally

Ingredients

• 3 large sweet onions, sliced crosswise into 1/4-inch-thick slices and separated into rings
• 1 teaspoon dried thyme
• 1 teaspoon dried parsley flakes
• 1 teaspoon garlic salt
• 1/2 teaspoon dried oregano
• 1/2 teaspoon dry mustard
• 1/4 teaspoon cayenne pepper
• 1/4 cup salted butter, cut into 1/4-inch-thick pieces
• 4 ounces mild cheddar cheese, shredded
• 4 ounces smoked Gouda cheese, shredded