You can enjoy a nice view virtually everywhere around Como Lake. But it is hard to find a better view than the one at  Trattoria Baita Belvedere in Chevrio where you seem to hang over the mountain edge overlooking Bellagio and the three branches of the lake. As is the case in most agriturismi type restaurants, the food is fantastic too. If you want to work up an appetite, you should park the car at the Tabbaccharia that is on your right just before getting to Bellagio. From the parking you can either go straight ahead up the steps or turn right. We thought it would be the path straight ahead but after heavy climbs straight up the mountain and through the bush, we had too much of an appetite when we - exhausted - finally found the place. If you take the path right, it is a very pleasant hike which takes approximately 1.5 hours. Going back, you just loiter back down on a well-filled stomach.
From May through September Belvedere is open every day, except Tuesdays. Outside the season, you should check their website