This version of cannelloni is from Sorrento in the southern part of Italy. They are fresher and lighter than the meat filled ones from northern Italy, and a bit less time consuming to make as well.
Put the butter and onion in a 10-inch skillet and place over medium high heat. Sauté until the onion turns to a rich golden color, about 5 minutes. Add the tomatoes, season with salt and pepper, and cook until the tomatoes are no longer watery, 10 to 15 minutes. Add the basil, cook for another minute and remove from the heat. Transfer the contents of the pan to a mixing