You don't need to slave over a stove for 3 hours to get caramelized onion. Here's what you do. After slicing the onion, get the pan up to a medium heat with a splash of oil. Toss in the onions and add a bit of salt to make them sweat. Once they start to dry out, go golden at the edges, and even stick to the pan a bit, add a splash of water. You do have to stir continuously for this method as well, but it takes much less time. Do this process a few times where you add water, cook it until its dry, another splash of water, cook it until it dries out again, etc. Sometimes I'll even alternate in a splash of white wine for fun. You should have beautiful caramelized onions in 30 min with this method.