Have you tried making ice lollies? They are brilliant for getting babies to eat greens and also fabulous for sore gums when teething starts in earnest. You do need to put a sweet favour in there so banana, strawberries or coconut milk but I got my first to eat kale, spinach etc and my daughter following suit. There are loads of BLW moulds available and you just blend everything and freeze.
Maybe give tiny portions and mix with breast milk. Like literally, a 5 pence piece size just to get going? 🤔
Try mixing a little bit of pear apple or prune purée with the veg to sweeten the taste a bit then you can gradually decrease it xx