freezing, cooking and re-heating - what are the rules?

[kelebek]

OK so I am trying to be more efficient and meal plan and do 1 shop a week cause I spend too much otherwise and this means getting meat in bulk (for me anyway) and having to freeze it.

So if I have mince that I freeze (straightaway) defrost over night. Then cook it up (2nd night) as a bolgnaise sauce for lasagne and put it in the fridge and then make the lasagne (night 3) and put the left overs in the fridge can I still eat it the next day? or have I heated it up too many times? and did that make any sense?

TIA