how about wood chips, you walk on, mulches the soil, worms come to live and enjoy..in a year or two, it breaks down, you toss it in the garden bed and put more on top. have seen people put cardboards over the grass and tons of wood chips over, suffocates the grass that breaks down and will feed the soil, so you don't need to remove it.
try watching that movie 'back to eden', he talks about how he gardens with woodchips.
if it is not a walking path, then you can plant clover, comfrey