My clicker training method combined with feeding outside of the enclosure will lessen the feeding response (rushing the enclosure door) and will make it safer when you go to open the enclosure and reach in.
I feed on the floor from a plate. Get a small square of linoleum or some smooth easy to clean and disinfect surface. Place it on the center of a floor. I floor without run is a good idea until the tegu is used to eating from a plate.
With a dog clicker in one hand, go get your tegu. Sit the tegu near the food. Click the clicker a few times and then put the tegu closer to the food if the tegu doesn't move closer to the food on its own.
The Pros: Lessened feeding response, your less likely to get bit, the tegu is less likely to ingest substrate and cause an internal blockage, your tegu will associate the clicker with food which is great if you let the tegu free roam inside or out.
The Cons: A little more work at each meal instead of just tossing in rodents.
Rick
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