Why? You'll just have an obese monitor. Stick to insects such as roaches, lean protein like ground turkey, eggs, f/t mice.
I've seen SO many in captivity that are grossly obese. It's disgusting. Fatty liver disease is very common as is a slow, early death.
Proper diets go a long way in the proper care of a monitor, especially Savs who have the propensity for getting fat.