Step 1

Preheat the oven to 375°F. Butter a 9x9" pan and set aside. Combine the garlic, cream and fresh rosemary in a small saucepan over medium heat. Add salt and pepper. Simmer for a couple minutes. Then add in 1/4 cup of the gruyere and 1/4 cup of the cheddar and stir until melted.

Step 2

Slice the sweet potatoes into thin circles and place in the pan in a row, overlapping a little. Sprinkle about 1/2 of the cheese over top. Then add another layer of potatoes and cheese.

Step 3

Pour the cream evenly over the top of the potatoes. Bake for 35-40 minutes, or until the potatoes are tender.

Step 4

Remove from oven and top with bacon if desired. Serve while warm.