Gain weight, but not gain so much fat.

Hello guys. I've been trying to keep my weight since 2016, after lost 40 kg, just following a food diet no working out, but now, but I think 40 kg was to much weight for me and I'd like to gain some weight but not gain so much fat. What could I do with this problem ?

Thanks.

from Bodybuilding.com Forums - Nutrition https://ift.tt/2NMxteo