Prepare rice according to package instructions.

Make Gravy: In a small saucepan whisk together milk, water and cornstarch. Add butter, bouillon, salt, pepper, onion powder and garlic powder. Bring to a low boil, stirring frequently. If using uncooked chicken, season it with salt and pepper and add to the pot, Reduce heat and cook until chicken is cooked through and sauce has thickened to gravy consistency. If using leftover cooked chicken, stir it in at the end.

To serve, add a spoonful of rice to a bowl. Pour chicken gravy on top. Add desired toppings.