Recipe courtesy of Guy Fieri
Save Recipe Print
Total:
1 hr 40 min
Active:
40 min
Yield:
4 to 6 servings
Level:
Intermediate
Total:
1 hr 40 min
Active:
40 min
Yield:
4 to 6 servings
Level:
Intermediate

Ingredients

Directions

Watch how to make this recipe.

Prepare a grill for medium-high heat. Preheat the oven to 350 degrees F. Grease a 9-by-13-inch baking dish with the butter.

Oil the sliced sweet potatoes and onions with the canola oil and sprinkle with salt and pepper. Grill the sweet potatoes and onions until slightly charred on each side and just halfway cooked. Set aside.

Combine the half-and-half, horseradish, thyme, 2 teaspoons salt and 1 teaspoon pepper in a bowl. Sprinkle one-third of the Gruyere in an even layer over the bottom of the prepared baking dish. Layer one-third of the grilled sweet potatoes and onions on top of the Gruyere. Repeat twice¿one-third of the cheese, one-third of the vegetables¿to create three even cheese-vegetable layers. Pour the half-and-half mixture over the top, cover with foil and bake for 35 to 40 minutes. Uncover and continue baking until the sweet potatoes are tender and the gratin is golden brown, another 15 to 20 minutes. Let rest for 15 minutes before serving.

Trending Videos 6 Videos

Get the recipe

Sushi Brain 00:53

This sushi brain is the most delicious way to creep out your friends.

Similar Topics:

IDEAS YOU'LL LOVE

Sweet and Sour Pork

Recipe courtesy of Alton Brown

Root Vegetable Au Gratin

Recipe courtesy of Sandra Lee

Sweet and Sour Pineapple Pork

Recipe courtesy of Sam Choy

Sweet, Spicy and Salty Candied Nut Mix

Recipe courtesy of Jeff Mauro

Salmon with Sweet and Spicy Rub

Recipe courtesy of Ellie Krieger

Sweet Potato-Onion Gratin

Recipe courtesy of Guy Fieri

Yukon Gold Potato Gratin with Horseradish, Gruyere and Sweet Onion

Recipe courtesy of Geoffrey Zakarian

Browse Reviews By Keyword

          Food Network Apps

          In the Kitchen

          Get over 70,000 FN recipes on all your mobile devices.

          Facebook Messenger

          Ask our bot for recipes, meal ideas and daily food trivia.