Go ahead and preheat your oven to whatever temperature the croissants are supposed to cook at. While your ground meat is cooking you have plenty of time to assemble the ring part of the Taco Ring, especially since ground meat pretty much baby-sits itself. Place your round pan on top of your bowl. This is going to allow for overhang (Overhang of what? you ask. Be patient!) Spray the pan with cooking spray. Give it a nice thick coat. Now open one tube of croissants to start with and unroll and separate them. Place the wide end of the croissant about three inches from the edge of the cookie sheet, allowing the thin edge to hang off the side (here's your overhang!). Continue in this manner all the way around the pan, using the rest of the croissants as necessary. Overlap the dough so that there are no open spots, pushing it together as needed. You will end up with a circle in the middle of your pan where there is no dough. That's the ring!