We have visited Venice numerous times, and when we can afford it and it's open, we visit Locanda Cipriani for a long, and sumptuous lunch. The restaurant is located on the island of Torcello, and takes about 45-60 minutes to reach by water bus--and sometimes a bit longer! It's wonderful all-day adventure, and the boat trip takes you past the islands of Murano and Burano. Besides the Locanda, there are two fine early medieval churches on the island, and not much else.
Lunch will include an impeccable presentation of traditional Venetian dishes served in a lovely dinning room overlooking the churches. In the summer, you can dine outdoors in their large rose garden. In the winter, when we were there, we dined in the small, cozy, white-tablecloth dining room; tended to by a fine, professional wait staff. You can order a la carte or from several set menus. The food was delicious, as always. For starters we enjoyed tagliarini with shrimp and cherry tomatoes, and a vegetable risotto. Our mains were a selection of grilled local fish and scampi, and a pan roasted Branzino covered in pistachios. For dessert we had an orange tart with chocolate sauce, and a delicious cream filled crepe, flamed with Cointreau. We drank a very good wine bottled for the Locanda by a local producer.
We highly recommend this culinary adventure. Be sure to book in advance on their website to avoid disappointment.