I love the lemon idea (fab idea as I don't use them up fast enough) - thank you for the tip!
I freeze: bread (yellow stickered bakery bread that I slice and then freeze), baguette (sliced into single portion sizes and frozen), cakes, pastries, crustless quiche/fritata, stewed fruit, cheese, milk, rice pud, chillies etc. I peel and slice ginger root and freeze that. I also buy garlic when on offer/yellow sticker and peel/freeze the cloves. Also: usual stuff like rice/pasta, home made chips and roasties (not tried freezing mash!), soups, curries, stews, pasta meals etc.
I used to freeze the meals in 4-portion containers but then started using single portion take-away style containers. Much bloody easier, as me/the DC can pick what we want for lunches/evening meals. I work FT (shift work), DS works shift work and DD is at school. We defrost what we want and either cook at work (me), or heat up and put in food flask (DS and DD).
^this all saves so much waste (and faff*!)!
*I LOVE cooking but I'm a lazy bint, who hates wasting food/money and will do anything to make my life easier. So, batch cooking and freezing whatever the hell I can is a bonus: means at home/school/work, we can all eat healthy meals for less money and there's hardly anything wasted.