Versatility.

Sautee some beef with olive oil, salt, and pepper. Add in chopped veg of your choice.

For lunch today, I am having steak and veg sautee over penne with (just a little!) parmesan-butter sauce.

For lunch tomorrow, I am having the same mixture, but over brown rice, with teriyaki sauce.

And all it took was 10 minutes of my time. Funny, that... doesn't it look like quite a bit more than that?