Caramelized onions - big batch!
This has got to be the absolutely best way to caramelize a bunch of onions (in this case, about 8 largish ones). Last night I sliced them all with the mandoline (still made me cry), filled up my crock pot and tossed them by hand with a few tablespoons of olive oil and a bit of salt.
They cooked overnight (about 10 hours) on low, then a couple more hours with the lid partly off to cook down the liquid. I'll now freeze them in 100 gram batches for use in all kinds of things!