Avocado and banana you just mash together. Wraps rolled up with cream cheese and sliced as finger food. Yoghurt with soft fruit mashed together. Unsalted tinned pulses (Asda sell them) rinsed and blended with a little milk/water and chicken (which you can get pre cooked off a deli, just take the skin off as it's salted). Cheese on toast for finger food. Steam white fish, flake it up (check for bones even if it is pre boned) and blend with plain yoghurt or milk and steamed veg/potato.
Boil pasta, throw in frozen sweetcorn/peas/carrots/spinach to cook with the pasta. Drain, add tuna (the kind in spring water, not brine) add a tin of chopped tomatoes and some grated cheese. Great for little hands to practice picking up (my ds like pasta tubes best). Freeze the rest in little tupperware pots and defrost as needed