Hi @sally92 The quorn chicken packet should have the calorific value on it, probably per 100g and/or per slice. It might be expressed as kcals – but it’s the same thing.

Many people on here use the app Myfitnesspal to track their fast day calories. I use this one:http://www.foodfocus.co.uk Others are available – any will do to make sure you keep within the 500/600 limit.

All the best and bon appetit!