Do a quick microwave (check every 30 secs). Just enough to soften the edges, but not enough to cook or even defrost. The raviolis should still be frozen hard. Then you can easily pry them apart. This method is especially good if you only want to remove a few ravioli and return the rest to the freezer. If you steam or soak them, you cannot refreeze because of the additional moisture.
If you are using a bag of frozen ravioli and do not want to cook the whole package, I just bang the frozen package on the counter a few times. I find that this breaks then apart, so that I can pull out only what I want and put the rest back in the freezer. Works well with packages for frozen veggies too.
Login using the form on the top of the page to post feedback (if you are a registered user). If you have not yet registered, click here to do so. It's FREE!.