When I have issues eating I go for non-offensive foods that are easy to swallow such as a can of white beans in tomato sauce, plain full fat Greek yoghurt, oatmeal made with milk and not water, lentil soup. I sometimes make 1000 kcalorie smoothies with half an avocado, 2 tbsp peanut butter, cup of 10% fat yogurt, a banana, 1/2 cup oatmeal and enough orange juice to make it liquid. Will not win any taste awards but does contain a bunch of good stuff.