Peel and chop 400g parsnips and steam (or boil) them until soft. Mash.
While the parsnips are cooking grind 2 tbsp chia seeds to a powder in a spice grinder or a pestle and mortar. Add 6 tbsp water and stir until you have a gloopy paste that's a bit like glue. Set aside.
Heat 1 tbsp olive oil in a frying pan and sauté a chopped onion until soft stirring often. Add 2 cloves crushed garlic, 6 chopped sage leaves and 1/4 tsp nutmeg and continue cooking for a moment or two.
Stir through 180g chopped chestnuts, 125g ground almonds, a small handful of chopped parsley and your chia paste and mashed parsnips. Warm through and season with salt and pepper to taste.