A quick and easy side for Osso buco:
Cook orzo until al dente. Orzo is a short pasta that resembles grains of rice and is easily found in most supermarkets. Reserve some of the orzo cooking water. Toss the cooked orzo with olive oil and some reserved cooking water. Add the zest and juice of 1 lemon. Simple and delicious! You can follow the same steps with any pasta of your choice and can add Parmesan cheese to taste.
For the gremolata, a mixture of orange and lemon zest also works well.