Best variety of garlic for slow cooking? Take a couple of heads of garlic, sit them in some oil with spices, and cook for an hour or two, then spread it on bread. It's great...with the right kind of garlic. With the wrong kind, you'll be praying for death, and so will everyone around you.

I've tried this a couple of times, and trial and error is not cutting it. Does anyone know a variety of garlic that is mild enough for this sort of thing, but still possible to find in a store?
Almost all readily available garlic is of the softneck variety. The mildest of true softnecks is artichoke garlic. Aside from a true softneck garlic, you may also want to try Elephant garlic. This is milder than true garlic, as it is actually part of the leek family, and might be too mild for what you're attempting to do here. Try both!