What can I do to help it recover?
That's where the answer is going to suck.
A plant doesn't heal itself like an animal. Rather it replaces or builds around.
That leaf will always be sunburnt and show the results of it with dead tissue.
The best thing you can do is find an area and light level the plant likes and keep it there. Then the plant will start sending out new leafs.
I bought my Monstera with two leafs about the size of yours back in late April (really it is two vines in one pot and each vine had a leaf that size). Now each of the vines has set 5 new large leafs and the most recent to emerge is 13 inches across and has the center holes (not just the split finger leafs).
Winter in the northern US will be difficult for the plants as our homes dry out so much with the central heating running.