Ah with smoothies as a liquid diet, add some corn flakes in it, it’s a bit more weighty and full feeling. What I do when making a smoothie: make a banana smoothie, add Kellogg’s cornflakes and blue berries and churn that up. Fulling, not thick depending on how much cereal you add, just a little will be enough and the blueberries are a good source of fibre, vitamin c and antioxidants. If blueberries is not a go because it’s not like then raspberry or blackberry is also good back up. Delicious. I need to get back into smoothies but haven’t made them because cold