>>76267364
If you buy raw meat at the store, the label will have the raw meat weight and nutrition information, so use those. You weigh the cooked meat after only for portion ratios and then convert those to raw equivalents.

If I buy 1lb [454g] of raw ground beef for 4 meals, it's going to reduce down during cooking to something like 350g cooked total, which is 87.5g cooked beef per meal, this is how I would record each meal:
>0.25lb [113.5g] ground beef

Don't forget to add the oil or whatever additives you use separately. If I use 16g of olive oil to cook all of that beef, I would add this entry for each meal:
>4g olive oil