Strawberries, asparagus and sprouts are all good, feed every day if you like.
Splint101 I would go easy on the seeds, use them as treats and encourage the pellets. I suggest Harrison's High Potency pellets, my vet recommends these, they are the best for greys.
Also offer some of what you are eating for the evening meal. Most anything you have is ok except for the forbidden foods which is listed in another topic on this forum.