The food in the net idea is one I haven't tried, but it might just work.
The system I have used with success with planted tanks takes patience but it does work. You will need two nets, one as big as can be reasonably used in the tank and the second as small as you can get. The idea is to move the small net around slowly keeping the fish moving. Only move the big net to scoop fish up (the less you move it the better). Where patience comes in is that if you get the fish moving to fast it is harder to catch them. If you have a lot of fish to catch you may have to spend several sessions hours or days apart to get them all. If you happen to have stirred them up to a frenzy you won't be able to catch them and you just need to wait for them to calm down.