*Here in the States, chili powder is a mixture of spices, so if you're elsewhere in the world, you'll likely have to mix your own (example recipe).
Note: When I worked at a small nonprofit, we would have "Slow Cooker Fridays", and this was the favorite meal to make. The ingredients were divided up.
-Onions, garlic, and olive oil
-Bread, croutons, cheese, etc.
I usually brought the chili powder, and there was already salt in the kitchen. If you work in a small office, I highly recommend trying this out with your coworkers. Freshly cooked food is such a relief, and it removes a bit of tension and stress in the office.