Instead of copying and pasting all the Pinterest recipes I've tried and liked I'm just going to post the links and a little blurby.
Balsamic Roasted Green Beans and Mushrooms - these were a really tasty side and made a nice change from soggy, boring greens.
Greek Zucchini Fritters - we've had these multiple times already and get 13 fritters out of the recipe. Stuart prefers them with salsa instead of tzitziki sauce. They'd also probably make a pretty tasty garden burger.
Stuffed Bell Peppers - I use this recipe as the base for stuffed peppers. Changes I make are using cooked rice, adding more seasonings and maybe a little pesto to the meat mixture, I make a red sauce or use Ragu and I don't remove it from the pan to thicken it. I don't always add cheese, and sometimes will add some tobasco... do whatever you fancy but be sure to season it up.
Paula Deen's Mushroom Burgers - we ate this twice in one week it was so tasty.