Hi Sian,
So nice to hear from you. I hope you are getting on ok. I think the emotional rollercoaster is to be expected. You sound like you're doing really well and lets be honest, there's more to life than what the scales say.
I think you might get some ideas from the JUDDD (Johnson Up Day Down Day) forum on here? Thats like fasting every other day i think? They have a list of low cal stuff on there and stuff.
I did a few fast days many moons ago and stuck to 500 cals on those days. I normally had half a carton of fresh soup and just vegetables with a splash of gravy for dinner but i'm not very creative as you can tell! My friend does 2 fast days a week and has porridge for brekkie, no lunch and a 200 ish cal ready meal for dinner (like the childrens ones you can get in supermarkets!) xx