Parrot Mash and chop recipe builder. Pellets aren't necessary if you add supplements and have a large nutritious recipe. To see why you might not want to feed pellets go to Parrot Universe > Nutrition > Dangers of Pellets
Is your parrot new to foraging, or just stuck at a certain level? This is just one example of how you can steadily increase the level of difficulty. In this example, you could start from the very beginning and use an uncovered cup. Make sure your parrot is watching when you introduce the cup and put a treat in it.