Everyday I feed my tiels a variety of foods. They eat a lot of scrambled eggs with cheese in them. They also like plain pasta, green beans, bread, peas, corn, and pretty much whatever we eat. They really don't go too nuts over fruits, but I still offer them some on occasion. The trick is to get them to at least check it out, even if they don't eat it. The way I did it was I put the food on a plain white paper plate (my tiels sometimes get freaked by a lot of colors at first), then I sprinkled millet on all the food. Then millet was enough for them to gradually go and check it all out. After that they started eating the millet, and after that eventually the food underneath. Now I don't use any millet to entice them. It might take a lot of time depending on your tiel. They all have very different personalities. I have some bold tiels and some timid, so the timid ones followed the bold ones lead. As soon as I put that plate on the bottom of the cage all four of them go running. It's actually really funny.