A crowd favorite side dish for Thanksgiving, featuring layers of sweet potatoes, Gruyère cheese, and a creamy sauce spiced with fresh herbs and topped with Parmesan and panko. This dish is simple to prepare and bursting with delicious flavors!
1: Preheat oven to 400°F while slicing sweet potatoes and prepping other ingredients.
2: Grease a 9x13” baking dish and add half of the sweet potatoes and half of the shredded Gruyère cheese.
3: Heat a skillet over medium heat, add butter and onions; sauté for 5 minutes stirring occasionally.
4: Stir in sage and thyme, then add flour and spices. Reduce heat and slowly add heavy cream, stirring frequently.
5: Bring to a simmer, then immediately remove from heat.
6: Add half of the creamy sauce to the layer of potatoes and cheese, then repeat with another layer of potatoes, remaining sauce, and remaining cheese.
7: Top with Parmesan and panko mixture.
8: Cover with foil or a lid and bake for 35 minutes, then uncover and bake another 5-10 minutes until top is browned and bubbly.
9: Allow to rest for 15 minutes before serving; top with extra herbs and black pepper if desired.
