Root Vegetables au Gratin
All your veggie sides in one dish!
Servings: 6 people
Calories: 559kcal
Ingredients
Bechamel Sauce
- 2 Tbsps butter
- 2 Tbsps flour
- ½ teaspoon salt
- ½ teaspoon pepper
- ¼ cuup dry sherry
- 2 cups whole milk or cream
- ¼ teaspoon nutmeg
Root Vegetables
- 2 large Yukon Gold potatoes
- 1 large sweet potato
- 1 large beet See Note 1.
- 1 large yellow onion
- 1 tablespoon flour
Cheese
- 2 ¼ cups grated cheese like Havarti and/or Gruyère You can also sub in Swiss or Jarlsberg
Topping
- 8 Tbsps butter
- 2 cup Panko bread crumbs
- ½ teaspoon salt
- ½ teaspoon pepper
Instructions
- Preheat oven to 350°F. Butter a 9 X 11 inch casserole dish.
Bechamel
- Melt butter over medium low heat in a medium saucepan. Whisk in the flour, whisking constantly for about 1 minute. Add salt and pepper.
- Add sherry, whisking constantly for about 1 minute. Raise heat to medium. Whisk in the cream, whisking constantly until mixture beings to bubble and thicken. Add nutmeg. Remove from heat when mixture is the thickness of a cheese sauce. Set aside.
Vegetables & Cheese
- Peel the potatoes, beet and onion. Cut them in half vertically and then slice thinly cross-wise. Shoot for slices to be of similar width. A mandolin on thick slice setting would work well here. Sprinkle the flour over the onion slices to coat.
- Layer the vegetables in the buttered casserole dish starting with a layer of beet slices, then half the onion. Spread ⅔ cup of Béchamel over the slices. Then layer Yukon, sweet potato and then the remaining onion. Top with remaining béchamel sauce.
- Distribute grated cheese evenly over the casserole.
- Spray a sheet of foil with baking spray and loosely tent the casserole dish. Bake for 40 minutes covered. Do not pinch down the sides. You do not want the vegetables to steam. See Note 3 if making ahead.
- While casserole is baking melt the butter for the topping. Add the salt and pepper. Toss in the panko crumbs and toss to coat.
- Remove casserole from oven after the 40 minutes above. Distribute crumbs evenly over the top and return to the oven for another 20 minutes uncovered. See Note 2. Check if a fork can easily pierce the vegetables. Return to oven if needed. If crumbs are getting too dark lay the sheet of foil loosely over the top of the casserole again.
- Remove from oven when vegetables are fork tender.
Notes
Note 1: You can easily substitute rutabaga, turnip or squash slices for the beet here to suit your tastes.
Note 2 : Cooking time will depend on the actual size of your casserole and the thickness of your slices. Mine actually took one hour and 20 minutes to become fork tender. Don't skip the foil or your cheese and crumb topping may get too dark.
Note 3: If making ahead remove casserole after 40 minutes and cool to room temperature, cover and refrigerated. Prepare topping when ready to serve and return to oven for 35 - 40 minutes until vegetables are fork tender and heated through. Cover for first 20 minutes and then remove to allow topping to crisp up.
Nutrition
Calories: 559kcal | Carbohydrates: 50g | Protein: 23g | Fat: 31g | Saturated Fat: 18g | Cholesterol: 93mg | Sodium: 738mg | Potassium: 1030mg | Fiber: 6g | Sugar: 12g | Vitamin A: 9269IU | Vitamin C: 24mg | Calcium: 673mg | Iron: 2mg