This is like a gratin, but lighter since it uses stock instead of cream.
Ingredients
- 2 ½ lb potatoes, peeled if russet, optional to peel if Yukon Gold
- 6-8 Tbsp butter
- 2 large onions, thinly sliced
- 2 cloves garlic, minced
- 1 ½-2 cups vegetable or chicken stock
- ½ cup Gruyere cheese, shredded
- ¼ cup grated Parmesan
- 1 ½ tsp fresh rosemary, minced
- 1 ½ tsp fresh thyme, minced
- 2 Tbsp olive oil
- Salt and Pepper to taste
- Fresh thyme sprigs for garnish
- Optional: Parmesan cheese
Directions
- Preheat oven to 350°.
- In a sauté pan, melt 3 Tbsp butter. Add onions and sauté 5 minutes. Add garlic and cook 2 minutes more. Add fresh minced herbs and cook one minute more. Remove from heat.
- Peel, then slice potatoes thinly using a mandoline or sharp knife.
- Butter a 9 x 13 inch baking dish. Arrange 1/3 potatoes in a single layer, then ½ the herbed onions and ½ the Gruyere. Sprinkle salt and pepper. Repeat this layering once more, followed by a final layer of potatoes arranged so they overlap slightly.
- Add just enough stock to submerge everything except the top potato layer. Top with more sprinkles of salt and pepper. Cut the remaining 3 Tbsp butter into small cubes and dot the top. Drizzle on olive oil and sprinkle on Parmesan.
- Cover with foil, bake 1 hour. Remove foil, raise oven temperature to 425°, bake ½ hour more. Garnish with fresh thyme sprigs before serving.