Try finger foods and dips. I remember when my boys were toddlers, if they couldn't dip it, they weren't interested. lol
pretzel sticks dipped in peanut butter or mustard
cheese sticks dipped in ketchup
baby carrots dipped in ranch dressing
celery dipped in peanut butter
breadsticks dipped in soup, like the roasted red pepper and tomato soup that comes in the carton (my kids loved this)
apple slices dipped in cinnamon apple sauce
apple slices dipped in dulce de leche (put a can of sweetened condensed milk in a pot of boiling water... don't open the can but you can remove the label if you want (I don't)... reduce the heat a little bit... to medium... and let it simmer like that at a low gentle boil for about two hours, adding more hot water as needed to keep the can covered. After about two hours, remove the can of milk, let cool, and then open it. Scrape and pour all the dulce de leche out - it's like a really delicious caramel sauce! When you first pour it out, stir it hard and fast with a wooden spoon until it glistens. The more you stir it while it's warm the more "caramelly" it will be.
Very yummy. My kids loved this with sliced apples. Just don't do this too often because it has a LOT of sugar! lol)
Anyway - think little finger foods and dippers... think about what they put in lunchables and then try to do your own version of them... kids love that stuff.
I just remembered my youngest son went through this phase where he wanted a banana and a small thing of chocolate pudding. He would dip the banana in the chocolate pudding and that was pretty much all he wanted to eat. Then he moved on to a macaroni and cheese phase... lol I worried about the banana thing because they can "clog you up" if you eat too many of them... but his doctor said he was fine so... and he never had a problem.
My older son used to like to dip slices of toast - I would make toast and then slice it short-wise to make little fingers of toast - he used to dip those toast fingers into strawberry jam and peanut butter that he mixed together himself with a spoon. Kids at the toddler age really thrive when they are allowed to do as much for themselves as they can. Often their temper tantrums are due to the feelings that they have no control over their lives... they want to do more and become really frustrated when the grownups won't let them. lol