With diabetes, you want to keep the amount of sugars and carbohydrates in your diet consistent.
Here are some tips to keep your smoothie diabetic friendly: https://www.nutriliving.com/blog/national-diabetes-month-balancing-your-fiber-and-carbohydrates
Try some of the recipe ideas here too:
As for a diet for a person who suffered from as stroke, we would recommend seeking counseling from your doctor because we are unaware of the limitations and the risks. In general, you should consume a diet high in fruits and vegetables, low in sodium and low in saturated fats.