Thank you so much for all of the responses! Costco, as it turns out, is a bit overwhelming, and it must take time to get used to all of the choices. Like Sam's Club, I can see myself spending WAY too much if I'm not careful.
There's SO much that I love (now that I've been).
For pre-made meals, I meant the kind in the deli that are fresh (not frozen). So far we've tried the Ravioli Lasagna (YUM!), Chicken Alfredo (kind of bland), and Chicken Enchiladas (decent, but better homemade). DH commented that the Ravioli Lasagna tastes like it is made in an Italian restaurant. It was really good!
Several people mentioned street tacos and that's still on my list of things to try next!
I love reading other people's lists!