Bring a large pot of salted water to a boil over high heat.
Add the orzo and cook according to package directions until al dente.
In the last 3 minutes of cooking, add the frozen edamame to the pot.
Drain the orzo and edamame together in a fine-mesh colander.
Do not rinse.
Transfer the hot mixture to a large serving bowl.
Add the diced orange pepper, halved tomatoes, fresh basil, dill, and chopped walnuts to the bowl with the orzo.
In a separate small bowl, whisk together the lemon zest, lemon juice, extra virgin olive oil, sea salt, and black pepper to create the dressing.
Pour the dressing over the orzo mixture and toss everything together until well combined.
Serve warm, at room temperature, or chilled.
Don't rinse the pasta!
Draining the orzo without rinsing allows the starches to help the zesty lemon dressing cling to every single piece.