Help? Any ideas?

shelbi. • 3beautifulboys1angelbaby♥️
Well my son is 3 years old, he ate most things when he was a baby but now he's so picky! Ugh!!!
He will not eat anything he hasn't seen before. He'll try the odd finger food sort, parties he eats a good lot of food but at home I can't seem to get him to eat different.
all he eats is chips, pizza chicken nuggets ect.. I'm sick of him eating that. I cook it because I know that if I put it on a plate he will eat it and he's not going to bed hungry rather than putting something Infront of him he won't eat. Every day is a constant battle to get him to try different! Had enough. 
So is there any way I can get him to try new foods?