1. Preheat oven to 375 degrees.

2. Place both squashes, celery root, yam, beet, turnip, parsnip, and shallots in a large bowl. Drizzle with olive oil and season with salt and pepper; toss to combine.

3. Evenly spread vegetables in a roasting pan or large rimmed baking sheet. Transfer to oven and roast until squash and parsnips are tender, about 30 minutes. Remove squash, celery root, yam, and parsnip from roasting pan and set aside on a platter; cover with parchment-paper-lined aluminum foil. Continue roasting beet and turnip 20 minutes more; transfer to platter and cover with foil.

4. Place almonds on a baking sheet and toast until golden brown, about 5 minutes. Remove from oven and let cool slightly. Coarsely chop and transfer to a medium bowl with vinegar and brown butter; stir to combine.

5. Uncover vegetables and drizzle with almond mixture. Garnish with reserved beet leaves and lemon zest.