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Ingredients
- 2 tbsp butter
- 1 large or 2 medium sweet onions (Vidalia) thinly sliced
- salt and pepper
- 1/2 tsp ground thyme or dried if ground isn't available
- 1 bay leaf, fresh or dried
- 2 lbs baby Yukon Gold potatoes or fingerling potatoes
- 1/2 to 2/3 cup cream
- 1/2 cup grated Parmigiano-Reggiano cheese
- 1/2 lb grated Gruyere or other swiss cheese
Preparation
Step 1
1. Heat butter in a skillet over medium heat.
2. Add onions, Season with salt and pepper, thyme and
bay leaf. Cook until very soft, sweet an slightly
caramelized, about 20 min.
3. Remove bay leaf.
4. While onions cook, place potatoes in pot and cover with
water. Bring to a boil, salt the water, and cook until
tender, 12-15 minutes.
5. Mash the potatoes with cream, season with salt and
pepper, and mix in the Parmigiano cheese.
6. Preheat broiler. Arrange the potatoes in individual gratin
dishes or a shallow casserole dish. Top with onions and
Gruyere cheese.
7. Brown gratin under hot broiler until bubbly, about 2
minutes.