Fill the gaps in the veggie garden

When I pull up something like today's potatoes it leaves a space in the garden which the local cats like to use as a toilet so I always try to fill it in some way to prevent this.  Sometimes I cover it with plastic mesh, or poke in numerous sticks but recently I've just cottoned on to a more useful method.  I plant something.

I grow trays of cut and come again salad leaves and drop those all over the place (also to cover gaps).  I thought if I transplanted some of the sad looking plants which have been cut a couple of times it wouldn't matter if they thrived or not, they were just there to 'cover' the loose soil.  So I hack out a lump and separate out a few plants and shove them in.

.... and, wouldn't you know it, they thrive on neglect and up they come!  I know you can keep planting radishes and lettuces and stuff to fill gaps but sometimes it isn't a workable space. It would be a problem trying to dig up the next potato plant with decent crops in the way, but I am going to plant some baby gem lettuces in a tray and move them on as the spaces grow and also plant some more radishes.