Absolutely, you can always cook your own food in Suvie. In fact, we have an entire section of website dedicated too assisting in these cooks under "Recipes." This page includes a whole list of resources including: Time and Temperature Guides, How to Vacuum Seal, How to perform various cooks, and 100s of quality recipes of classics adapted by our in house chefs on our Joie de Vivre blog.
You can cook any protein that you would normally use with the sous vide style of cooking. For vegetables we suggest those that do well steamed for typically no longer than 20 minutes. For starches: rice, whole grains, and quinoa do very well. For pastas, we recommend using extruded shape noodles (such as macaroni or farfalle bow ties). Because Suvie does not have a stirring element, longer pastas such as spaghetti can "clump."
Additionally, you can take advantage of Suvie's Slow Cook function to cook your favorite slow cook recipes in your Suvie.