The spring ephemeral plant mouse-ear cress is a well known example.
From the en.wikipedia.org
The chilli, spring onion and purple cress on top leavened things a bit, but didn't altogether solve matters.
From the telegraph.co.uk
Whether it's cress for the windowsill, cat grass for the cat or tomatoes for next spring, one tiny seed will produce great bounty, for little cost, and that's worth celebrating.