Pregnancy diet ideas?

Hi I'm 20 weeks pregnant on Sunday and obviously I don't know what to eat/ cook that would be good? Obviously I eat alot of fruit and yogurts, but this baba just makes me crave lots of sweets/ chocolate/cake etc lol, I drink lots of water but I also want to eat a well balanced diet too keep baby healthy and well, so I was wondering what you ladies usually eat etc? As I'm having a hard time thinking about what I should eat as I cant keep eating wedges and mash potatoes every night lol x