We don't have a toaster oven so I put them on a foil-lined cookie sheet and under the broiler for a few minutes. They darkened fairly quickly so keep a close eye on them. There are instructions on the back...they don't do me much good, even with Google Translate, so I stood in front of the oven with my daughters diligently watching.
We let them cool for a minute or two, I snapped a picture and they were scarfed down! My younger daughter preferred them before they went into the oven and my older daughter and I loved them after. Not only did they taste like cheesecake, the texture was spot-on. The cookie inside wasn't crunchy...they were perfect! We'll be buying more if I can find them again...I looked in five or six stores (including grocery stores) before finding them.
I found the commercial for them on YouTube. If you subscribe to Pass the Chopsticks and receive it in your email you may need to visit this post directly in order to view the video.