Steam broccoli or, if frozen, microwave as directed.
Meanwhile, whisk 2 teaspoons of Dijon mustard, low-sodium soy sauce and hot sauce together.
Taste, adding more hot sauce and Dijon mustard if needed. (Chef Lindsay Nixon says she usually adds up to 1 1/2 teaspoons of hot sauce and 3 to 4 teaspoons of Dijon.) If the Dijon is too strong for your liking, add a few drops of agave nectar or a pinch of sugar to help cut the bite.
Mix with cooked rice (if using leftover rice, add a splash of broth or water before reheating it).
Then mix in cooked broccoli, season with salt and pepper, and serve.