Mushroom and Squash Wellington (Veggie Roast)
This show-stopping veggie-only Wellington is a luxurious main dish for your holiday meal, or for any other special occasion. It’s completely vegan, but will delight plant-based eaters and non-vegetarians alike.

Ingredients
1 large frozen puff pastry sheet, thawed
2 large sweet onions, halved and thinly sliced
3 medium carrots, peeled and halved
1 cup butternut squash, small dice
8 oz. maitake or shiitake mushrooms, brushed and cleaned
3 cups spinach
4 large Portobello mushrooms, de-gilled, cleaned, and roughly chopped
½ cup raw cashews, chopped
1 Tbsp garlic, minced
8 sprigs thyme
Salt
Pepper
Olive oil
Directions
- Defrost your puff pastry sheet. Store-bought packages often come with two sheets, so you can double the rest of the ingredients and make two if you are feeding a crowd.
- Preheat oven to 400 degrees.
- Spread sliced onion on baking sheet and drizzle with oil and season with salt and pepper. Toss onions to coat.
- Spread onions out evenly and cook for 15-20 minutes, stirring every five minutes. After 20 minutes, turn oven down to 350 degrees.
- Spread squash and carrots on a baking sheet and lightly drizzle with olive oil and season with salt and pepper. Lay 4 thyme sprigs over the top of the veggies.
- Pull apart maiitake mushrooms (or slice shiitake mushrooms, if using). On another baking sheet, spread maiitake (or shiitake) mushrooms out, lightly oil, and season with salt. Place 4 sprigs thyme over top of mushrooms.
- Put squash, carrots, and mushroom pans into oven (with onions). Bake for 15-20 minutes. If squash and carrots are not cooked through at 15 minutes, remove mushrooms and onions and cook squash and carrots for another 5 minutes. Toss onions as needed, and can remove earlier than mushrooms if they are nicely browned.
- Remove all pans from oven and let all veggies cool.
- When cool enough to handle, remove thyme sprigs. Remove herbs from stems and chop.
- Toast cashews in 350 degree oven for 5-7 minutes, checking often so they don’t burn.
- Saute spinach with a touch of olive oil, ½ teaspoon garlic, and a dash of salt. When cool enough to handle, wrap in a paper towel and squeeze to remove excess liquid. Set aside.
- Saute Portobello mushrooms with a touch of olive oil, 1/2 teaspoon garlic, and a dash of salt until they soften. When cool enough to handle, wrap in a paper towel and squeeze to remove excess liquid.
- In a large bowl, combine the onions, squash, spinach, cashews, all mushrooms, remaining garlic, black pepper and 1 teaspoon of salt. (Leave the carrots out.) Mix and combine well with your hands to make filling.
- To make the Wellington: Lay out puff pastry on a clean work surface. Brush with olive oil.
- Spread the filling out in a single layer, leaving a 2-inch border all around.
- Lay the carrots out horizontal to the bottom with some space between them.
- Roll the puff pastry sheet up like a burrito, tucking the sides in once while rolling. Make sure you don’t roll too loosely, or it will fall apart when cut.
- Gently roll over so seam is at the bottom.
- Brush top with olive oil. Score with knife.
- Bake in a 400 degree oven for about 15 minutes or until nicely browned.