Here we go- i found this quote from Proexotics.com (check out the site, it is helpful.
Your monitor is not a child, it doesn't need "treats". It needs terrific husbandry, great temps, and a proven, nutritious diet. Rodents, feeder insects, DONE.
Feeding these treats, or esoteric foods, is ALL ABOUT YOU. But it isn't about you, it is about the monitor. Quit projecting your appetite on your animal!
Rodents are whole foods. Nutritionally complete in a handy little package. Feeder insects are safe, nutritious and provide good roughage.
Offering food items like eggs is only asking for trouble. They are not nutritionally balanced, and you risk getting your stubborn monitor hooked on an inappropriate diet. Offering cooked meat is ignorant. Your monitor is not evolved to properly digest cooked foods. They eat their meat RAW, that is what they are built for.
Your monitor will be plenty "happy" eating rodents and feeder insects. If it does not want to eat these items, it is YOUR fault, not the fault of the monitor. You are delinquent in some aspect of husbandry. Temperature, substrate choice, lack of hide spots, cage overcrowding, there is a problem in there somewhere. Find it and fix it.
A properly setup monitor of any size does not need to be enticed to eat by offering eggs, beef heart, or lollipops. Take a harder look at YOUR husbandry, and technique, you will find the problem there, not in the appetite of the monitor.
If you are committed to being a responsible monitor owner, feed a proven, nutritious diet. Rodents and feeder insects. DONE.