Couple of chickens.
Throw the grass cuttings in, the chickens will scratch around, eat a bit, and find it all a bit interesting. Add a few side shoots from the tomato plants and any leafy greens past their sell by date.
A week later no grass cuttings, happy chickens and a dozen eggs.
We have eight chickens, and they're pretty good at scratching around and laying eggs They keep the dogs (and the cat) amused too
But the compost heap at the end of the garden got bigger by the week - I had to dig it out with the tractor in the end.