Potato, Celeriac & Zucchini Casserole
2 lbs. celeriac;, peeled, halved, thinly sliced
2 lbs. russet potatoes, thinly sliced
1 bag frozen zucchini, defrosted, pressed to remove excess water
1/2 tsp. ground nutmeg
1 large onion, thinly sliced
3 garlic cloves, minced
2 cups grated Gruyère cheese
2 cups chicken broth or vegetable broth
1 cup whipping cream
Preheat oven to 375°F. Butter 13 x 9 x 2-inch glass baking dish.
Arrange 1/3 of celery root slices in dish. Top with 1/3 of potato slices. Sprinkle with salt and pepper, then 1/4 tsp. nutmeg. Top with half of onion slices, half of garlic, then all zucchini, then half of cheese. Repeat layering 1 more time.
Bring broth and cream to simmer in medium saucepan. Pour over vegetables. Sprinkle generously with salt and pepper. Cover baking dish with foil. Bake casserole 1 hour. Remove foil. Bake until vegetables are very tender and liquid bubbles thickly and is slightly absorbed, about 55 minutes longer. Let sit 15 minutes.