Does he eat pasta? Cook it into the sauce with that, that's how I normally get my son to eat what he needs 😊 xx

There are also alot more iron rich foods he can have so Google to see if there are any more that he actually enjoys xx

Make smoothie ice lollies you can add the spinach to the fruit blend it up and freeze.

Blend the peppers and spinach and pack it in your lasagne,pasta dishes with mince.

Let him put his own pizza toppings on, peppers being a choice with shredded beef or something like that.

Let him pick what he wants out of bowls. Make or buy dips like humus and those pack of four dips, let him dip peppers into it if it has a different taste with it he might enjoy them more xx

Maybe blend the food...and use their favourite toy, book or show to feed xx