Last summer this was part of our lawn.
One afternoon in August, partner Nigel made a timber frame. I laid cardboard over the grass, and then filled the frame with compost.
This is how it looked by the end of that afternoon.
In September I planted some onion sets and sowed some spinach and broccoli
Now, half a year later, the onions are flourishing, and I have been picking spinach leaves for meals. This is the first time I have managed to grow spinach that hasn’t bolted. Note to self: from now on, sow spinach in the autumn, to overwinter. The broccoli isn’t looking wonderful, but there is plenty of time yet for that. And as a bonus, some self-seeded land cress has appeared. A side-effect of using our own compost. I’ll put up with the weeds for that!