Carolyn,
Your dAd stepped up to the plate and did almost all the cooking year that my job teaching chemistry required about 12 - 14 hours per day (7 days a week) of my time.  He watched a lot of TV cooking shows about that time and really did introduce a lot of new ways of cooking into his/our life.  The "lots of vegetables" thing was an agreement (even competition) we set up.  
The new way of thinking was to stop worrying about how many "servings" per day and start thinking about how "many different vegetables" we can incorporate every day.  We have had meals that contained as many as 9 or even 10 different vegetables.  Usually we get about  7.  Last night's sauce in the lasagna had tomatoes, onions, zucchini, garlic, celery and mushrooms. The salad had lettuce (2 types), spinach, green onions, cucumber and fresh tomato. Then we also cooked some frozen corn.
Love,
MoM