Preheat oven to 180°C/gas mark 4
Peel the parsnips (or mixed root veg) and cut into bite sized chunks
Peel the red onion and cut into wedges
Put the root veg and onion into a mixing bowl, add 2 tbsp olive oil, ½ tsp salt and some black pepper and toss well
Spread on a baking sheet and roast in the oven for 30-40 minutes or until the veg are cooked through and have taken on some colour
The onions may cook faster and need to be removed earlier
Remove from the oven and leave to cool
Meanwhile, get a small bowl and whisk together the tahini, lemon juice, 1 tbsp water, garlic and a pinch of salt, until the sauce is the consistency of honey
Toast the pine nuts in a frying pan with a little oil and a pinch of salt until they are golden brown then quickly remove from the pan to stop them burning
To serve, spread the roasted veg on a plate, drizzle over the tahini sauce, sprinkle on the pine nuts, followed by the za’atar and parsley