Try cooking some rice or couscous mixed with some lentils and beans do not add salt to the cooking process but you can add spices. Greys and most Parrots will enjoy a warm food and you can cut some fresh veggies very small and add to the mixture. No onions, Avacado or Garlic but any dark leafy greens, bright colorful peppers , carrots, beets, sweet potato and a little fruit like Mango, figs or Coconut shreds should be good.