I love adding grains like barley or farro to salads; they add heartiness and texture! You can find both at your specialty food store or at some major groceries (next to the rice), or you can order what you need online (Amazon Prime, anyone?).
For the dressing, I'm bringing back an old favorite: this strawberry balsamic vinaigrette with a secret ingredient - strawberry jam! The jam adds sweetness and does really well when whisked together with olive oil and balsamic. Plus, this was the very first vinaigrette recipe I ever made (that was five years ago!) and it's stayed a favorite ever since.
Spring Barley Salad with Strawberry Balsamic Vinaigrette