Makini Howell knows a thing or two about hosting a plant-based holiday: She was raised vegan, and she has served a four-course Thanksgiving dinner at her Seattle restaurant, Plum Bistro, since it opened in 2009. Her recipes come from her family and include a smoked seitan roast developed by her late father. “I wanted to serve something that looked like a ham or turkey for that familiar feeling,” she says. Assuming most people don’t want to make their own seitan, Makini adapted the recipe to focus on the rich maple glaze, which you can use to dress up a store-bought roast.
Make the glaze: Whisk the melted butter, mustard, maple syrup, Worcestershire sauce and garlic powder in a bowl; season liberally with salt and pepper. Set the glaze aside.
Cook the roast: Preheat the oven to 375˚ F. Place the roast in a roasting pan or baking dish and pour the glaze on top. Cover with foil and bake 15 minutes, then remove the foil and bake 5 more minutes.
Meanwhile, make the vegetables: Put the vegetables on a rimmed baking sheet and drizzle with vegetable oil; add the garlic, season with salt and pepper and toss. Roast until almost fork-tender, 10 to 15 minutes. (If mixing vegetables, note that they may be done at different times.)
Slice the roast about 1/4 inch thick in the pan. Add the roasted vegetables to the pan with the roast. Brush everything with the glaze from the pan, cover with foil and return to the oven. Roast about 10 minutes, then remove the foil and continue roasting until the glaze starts to bubble and caramelize and the vegetables are fork-tender, about 10 more minutes.