Even just the frozen food at your normal grocery store is really good. I’m pretty sure some of it it sourced in the same place these restaurants get their food. (I’m pretty sure I can get McDonald’s hash browns at my local Kroger.)

If you tend to buy in bulk, you might want to check out restaurant supply places like GFS. If I am doing bulk baking or cooking, I will sometimes pick up a few things from them. They are open to the public and sell a lot of stuff that restaurants use, too.