Pre heat oven to 200c or 180c fan.Throw onions, sweet potato, tomato, courgette, garlic, cumin, chilli powder, dill, lemon juice, oil and a pinch of salt into a casserole dish. Roast for 20-30 minutes. ***Note*** If using quorn: add with the vegetables If using meat mince: you should first braise the mince until all excess liquid is gone and mince is beginning to caramelise