This is especially good if you belong to a CSA and wind up with odds and ends like kohlrabi in your ‘fridge. Just julienne the kohlrabi, yellow squash, and carrots, then throw in some sliced cabbage and sweet onion.
Heat up about a tablespoon of olive oil, add the onion and cook until soft, then stir in the rest. After about 2 minutes add about 2 Tbs. of water, cover and let steam for another 2 or 3 minutes. Season with salt and pepper.
As I am sitting and reading your post I am watching something with Alice Waters. The dish she prepared is similar to yours but she added fresh fennel and mushrooms. Your recipe looks fresh and delicious.