Preheat your oven to 200°C / 390°F and line a bread tin with baking paper, greasing it with olive or coconut oil. Place sage leaves at the bottom.
Blend chestnuts, walnuts, cashews, and apricots in a food processor until crumbly (about 1 minute).
Grate the carrot and parsnip, and finely chop the garlic, onion, rosemary, and thyme.
In a large bowl, mix the nut crumbs, flour, grated veggies, garlic, onion, herbs, chia seeds, salt, and pepper. Toss gently with your hands.
Add water and press the mixture together until combined. Let it sit for 10 minutes to bind.
Pack the mixture into the prepared tin and bake for 45 minutes, keeping an eye on it.
Rest the nut roast for 10 minutes after baking before slicing with a sharp knife.