just an idea that worked with my son, he wasn't loving food and wouldn't eat. (didn't take to food till 8 months)
So what i did was put some food on his tray so he could feel the texture and use his hands to touch it, and squish it and throw it it is very messy... But this helped because he could feel it and it wasn't something i was trying to get into his mouth. I gave him time to exlpore, to see it. Also ate with him so he could see me eating.
Just like everyone else said... Finger food is great.
Plunket nurse suggested rice crackers, arrowroot biscuits but i found cruskits the best as they just suck them to bits.
Also: Slices of avcoado, tinned peaches, pears, mango, toast with marmite. (He doesn't like friut but it may work!!)

I never thought Luke would eat and would be on breast milk forever but one day he just took to it...It will happen, what i did was relax.... and not make it in to a food war! Because i was so stressed out about it. He was picking up on it and wouldn't open his mouth!!
hope this helps!

hang in there