Chickpeas are a good source of protein and fiber, meaning that they will get, and keep, you full. You can try making your own and experimenting with spices (Silberman and Reiger like this recipe) or grabbing a bag from a brand like The Good Bean.
I think this is totally cool! A modern age tri-corder. To be able to use for dietary uses... look for allergens, or even look for poisons. This has unlimited possibilities as the tech gets better. At some point, this might even be included in our phones!