How can I smooth an edge from a cut-out? I have a rounded "onion looking" shape and have used a Boolean modifier to cut a hole out of it:



Now I'm trying to smooth out the edges so there are no harsh corners on the shape. How can I do this?

Here I have highlighted the area I'm trying to smooth out:
Once you've applied the boolean, rearrange the topology so that it's a good one, then bevel the edge: