I recently discovered something (well I was given a some by a friedn who was concerned about my continued weight loss) called Spiru-tien Whey - made by Nature's Plus it comes in a can premade or individual envelopes or large can of powder (that's the one I have been using)- it's a little pricy in the health food stores where it is generally sold but I was able to find it much more reasonably proced on the internet
It comes in a bunch of flavors but I have only had the vanilla so far which I found very tasty ( which suprised me since I don't like the taste of anything very much anymore)
It has 100 % of the vitamins you need - more than the instant breakfast but doesn't supply a lot of calories - ( I think it is actually marketed to people trying to lose weight) so instead of the recommended lowfat milk I have been using whole milk and occassionally (If I have it in the evening) I have been adding a couple of scoops of vanilla ice cream to it to add to the calorie and fat count.
I have not gained any weight since I ahev started using it but I have not lost naymore either which is a good thing! I also feel a lot more energetic.
I also suggest cream soups like cream of potato, cream of tomatoe, lobster bisque. I also find broiled scallops and barbequed baby back ribs (super mild barbeque sauce need ed though!) very easy to eat