If you're one of the people who like the bowls from fast casual places like Chipotle, Qdoba, or even those poke bowl places, get their non-protein/vegetarian option then go home and add your own protein. This saves about $2-$4 a bowl and can possibly extend the bowl's lifespan into two meals.

I bring it home my bowl and add in my own falafel, chicken, shrimp, or whatever protein I have on hand. Getting frozen protein and airfrying it is the easiest. I guess I could also grill stuff but I'm usually short on time.