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SIDE DISH RECIPES

Sweet Potatoes Gratin

This sweet potato gratin is an easy side dish to accompany a Sunday roast or holiday dinner!

Sweet Potatoes Gratin
Prep time30 min
Cook time90 min
Total time120 min
Serves6 servings
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When it comes to side dishes and vegetable accompaniments, especially with Sunday roasts or holiday dinners, you can’t beat classic potato gratin. But there are loads of vegetables out there that make a great gratin too, so hopefully, here’s a variant of this cheesy classic. Today’s dish is a gratin of sweet potato, potato, zucchini, cheddar, and pear. Yes, as you read well. Potatoes are steamed to start the cooking process, then layered in a dish with zucchini and pear slices, smothered in cream sauce, and baked in the oven with a cheese topping that crisps as it finishes baking. This hearty sweet potato casserole can be served in a variety of ways: It makes an excellent side dish for any holiday meal, but would also work well as a starter or even a vegetarian main course served with a nice salad and crusty bread.

Nina L. Palmer
by Nina L. Palmer
Nina L. Palmer

Nina Palmer is a recipe developer and editor for Eatwell101 since 2013. She is passionate about food and culture and specializes in sweet recipes, desserts, baking, as well as developing editorial content.

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Updated Mar 26, 2026
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Photo credit: © Eatwell101.com

Preparation time: 30 min – Cooking time: 1 hour 30 minutes

Ingredients list for the sweet potato gratin

Serves 6:

  • 2 large sweet potatoes
  • 2 large potatoes
  • 2 zucchini
  • 3 pears
  • 1/2 cups (10cl) of liquid cream
  • 3 cloves of garlic
  • 1 pinch dried rosemary
  • 10 fresh sage leaves
  • 3 1/2 oz (100g) cheddar
  • Salt and pepper
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Directions

1. Heat the cream in a saucepan with chopped garlic, rosemary, and whole sage leaves. Turn off the fire and let it steep, covered.
2. Meanwhile, peel the potatoes and sweet potatoes. Steam until tender (20-30 minutes). Allow to cool, then cut into thin slices.
3. Peel pears and cut them into strips along with zucchini (no need to peel them).
4. Fill the dish, alternating 1 row of potatoes, 1 row of pears, 2 rows of sweet potatoes, and 2 rows of zucchini ( have them tightly against each other to make them stand upright ).
5. Remove the sage leaves from the sauce. Add 2 coffee spoons of salt and a pinch of pepper, then pour over the vegetable slices. Sprinkle with grated cheddar.
6. Bake for about 1 hour in a preheated oven at 390°F (200°c).

Enjoy with a salad or as an accompaniment to white meat.

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