- 1/2 cup butternut squash, peeled and cut into 3/4-inch cubes
- 1 small head celeriac, peeled and cut into 1/2-inch cubes
- 2 medium carrots, peeled and cut into thick matchsticks
- 1/2 cup white cauliflower florets
- 1/2 cup green cauliflower florets
- 8 ounces Brussels sprouts, cleaned and trimmed, sliced lengthwise if large
- 1 medium beet, peeled and cut into 1/4-inch pieces
- 1 small turnip, peeled and cut into thick 1-inch long matchsticks
- 1/4 cup olive oil
- 3/4 teaspoon salt, plus more to taste
- 1/8 teaspoon freshly ground black pepper, plus more to taste
- 3 cloves garlic, minced
- 2 medium shallots, peeled and minced
- 1/2 cup dry white wine
- 1 1/2 cups vegetable stock
- 1 cup all-purpose flour
- 2 teaspoons baking powder
- 2 teaspoons chopped fresh tarragon
- 3 tablespoons unsalted butter
- 1/2 cup milk
- 2 tablespoons freshly grated Parmesan cheese
- 1 medium zucchini, cut into thick 1-inch-long matchsticks
- 2 tablespoons all-purpose flour
- 2 tablespoons chopped fresh tarragon
- Heat oven to 425 degrees F. Place squash, celeriac, carrots, cauliflower, brussels sprouts, beet, and turnip or parsnips in a large roasting pan. Toss with 2 tablespoons olive oil, 1/2 teaspoon salt, and 1/8 teaspoon pepper. Roast for 35 to 40 minutes, stirring twice during the cooking. Remove, and reduce oven to 375 degrees F.
- Heat remaining 2 tablespoons olive oil in a medium skillet over medium heat. Add garlic and shallots; saute until soft, about 5 minutes. Raise heat to high, and add wine. Let white wine reduce by half, 1 to 2 minutes. Add vegetable broth, and simmer over medium-high heat for 5 minutes. Set aside.
- Combine 1 cup flour, baking powder, remaining 1/4 teaspoon salt, and 2 teaspoons tarragon in a food processor. Pulse in butter until mixture resembles coarse meal. Add milk and Parmesan, process until combined, and set aside.
- Transfer vegetables to a large bowl. Add zucchini, remaining 2 tablespoons flour, and 2 tablespoons tarragon; toss to combine. Stir in broth, and adjust seasoning with salt and pepper to taste.
- Transfer to a shallow glass pie dish, and bake for 15 minutes. Remove vegetables from the oven, and drop heaping tablespoons of the biscuit dough over vegetables, leaving some vegetables exposed. Place the pie dish on a baking sheet, and bake until biscuits are golden, about 25 minutes.