Veggies as alternative chew toys.?

kinda weird question but my dog loves to chew and bully sticks were working until flatulence took over(i will not use raw hide and he just tears through toys and i cant leave him unattended so i wanted to give him something he could chew and ingest (safely)...so i started giving him whole carrots to chew...and i used whole apples (he loved those) but what other veggies or fruits have your dogs enjoyed RAW?