Ingredients
Equipment
Method
Preparation Steps
- Preheat the oven to 400°F (200°C). Grease your baking dish with butter or cooking spray.
- Melt 3 tablespoons of butter in a medium saucepan over medium heat. Add minced garlic and diced red onion, sauté for about 5 minutes until translucent.
- Stir in 1/4 cup of all-purpose flour and cook for another minute. Gradually whisk in 1 cup of heavy cream and 1 cup of half and half, cooking for 3-4 minutes until thickened.
- Turn off the heat and mix in 1 cup of shredded asiago cheese, 2 tablespoons of fresh rosemary, 1 teaspoon of smoked paprika, 1/2 teaspoon of ground sage, kosher salt, black pepper, and a pinch of nutmeg. Let cool slightly.
- Peel and thinly slice 2 large sweet potatoes to about 3/8-inch thickness.
- Layer the sweet potato slices in a greased baking dish, or coat them with the sauce in a separate bowl before arranging.
- Stir half of the shredded colby jack and smoked gouda cheese into the cooled sauce. Pour over the sweet potatoes and sprinkle remaining cheese on top.
- Cover with foil and bake in the preheated oven for 45-50 minutes until tender.
- After baking, remove the foil and bake for an additional 15-20 minutes until golden brown.
- Let the gratin rest for 10-15 minutes before slicing and serving.
Nutrition
Notes
Slice sweet potatoes evenly for consistent cooking. Allow the sauce to cool before adding cheeses to prevent clumping. Cover with foil initially to avoid quick browning.
