Oh I'm so sorry to hear this is making you so sad and worried
OK clearly not filling up on fruit then.
I offered only pasta with sauce and then tried some chicken/apple puree snuck in there between bites
I can only say how my LO would be and he would throw a fit if I tried to sneak anything, he likes to know exactly what he's getting and nothing hidden, won't even have 'mixed up' food (ie stew I pick out all the different bits and put a clear pile of each thing on his plate so he knows exactly what each thing is and there is no way he would eat something like a shepherds pie with meat and mash potato for example - only now approaching 2.5yo will he consider picking the parts he wants out for himself and I honestly don't consider him a picky eater). I would try just the pasta, even plain pasta if he prefers that. Then in a different meal one or maybe two type of veg, something he can recognise. Do you think he might prefer to self feed and not be spoon fed?
In one of your posts you said he would refuse his meal but then accept something you are eating. Have you tried making your own meal (it might not be your 'real' meal it might be a small selection of things that he likes and is safe with) and sitting eating it just letting him take yours? Does he eat better when eating out because a big occasion is made of it, the social aspect and the full family around a table? Do you emulate this at home? You also said he'll take a snack standing or sitting but hate to be at the high chair. I am BIG on eating meals at the table however if I was facing this I would ditch the table and just let him eat anywhere to get him used to eating regularly. You could gradually reduce where he eats and bring it to the table at a later date after resolving the whole 'food issue'. Just a thought.
I don't think rice cakes are particularly nutritious are they? I would prob not offer those because with little going in every mouthful counts. You could find a more nutritious cracker perhaps? I tend to throw out the packaging and keep a big selection in a tin so I don't have the ingredients lists to hand but one pack in my cupboard is milk soy free, I'm sure there must be more (3 crackers = 1 serving of grains).
I made some cup cakes from white beans (good protein, plus lots of eggs too) they are totally healthy, recipe on the allergy recipe thread if you're interested in trying it. Don't all toddlers like cake? (we all loved them including DP, Granny and Nana, no one knew they were healthy).
You can make flat breads with just plain flour, salt, olive oil and water - would that be worth a try? if he didn't like them you can freeze and try at a later date?
Banana muffins?
Banana cake?
(I'm thinking these might not go down too well if he doesn't like texture or bread but they are very cake like, sweet and tasty)
My DS likes pate, I started making home made pate so I could reduce or cut out the salt to make it baby friendly (although salt intake is not so strict after 1yo), Maybe a very smooth pate? Made with coconut oil instead of butter?? (or even goose fat or something like that??) - my DS was eating it in chunks the other day instead of spread on crackers!
Can you ask for a referral to a dietician/nutritionist or an OT to help with texture issues and food aversion?