Heat the oven to 400°F. Line a rimmed baking sheet with parchment paper.
Add the ground turkey, egg, almond flour, onion, parsley, rosemary, thyme, salt, and black pepper to a large bowl. Mix gently until combined. Avoid overmixing, which can make the meatloaf dense.
Shape the mixture into a compact loaf in the center of the prepared baking sheet.
Place the carrots, parsnips, and sweet potato in a separate bowl. Add 1 tablespoon of olive oil and toss to coat. Spread the vegetables around the meatloaf, leaving a little space between the pieces. Drizzle the remaining olive oil over the loaf.
Bake until the vegetables are tender and the center of the meatloaf reaches 165°F, about 40 to 50 minutes. If the vegetables are ready before the loaf, transfer them to a serving dish and continue baking the meatloaf.
Let the meatloaf rest for 5 minutes before slicing. Serve with the roasted root vegetables.