Baby food purees are a great place to start when you are dealing with those restricted to a pureed diet.  Whether they are special needs adults or children or just an older adult who has lost their ability to chew food, starting simple is best.  How a food looks, smell and feels is as much apart of enjoyable eating as taste is.  Each person is different.  When testing a new blended food start small.  Making a large quantity of a new food is a waste of time and money.  Some, like Matthew have a fear of trying new foods simply because they have become accustomed to drinking processed protein shakes and liquid supplements.  New tastes can be overwhelming.  Encourage 1-2 small spoonfuls but never force them.  Forcing them will only make it harder to get them to try something new the next time.  The link below is directly from Vitamix and can also be found in their whole Foods recipe book:

https://www.vitamix.com/Find-Recipes/B/A/Baby-Food-Pur%C3%A9es

Yes, it can be frustrating but don’t give up.  Please feel free to contact me if you have specific questions.  I will do my best to help you with your particular need.