Combine juice of the lemons, mustard, honey, and olive oil. Whisk together and set aside.
Prepare orzo per package directions in heavily salted water. Undercook the orzo by 1-2 minutes.
As orzo cooks, place large saute pan over high heat. Toss chicken in salt and pepper and brown, 6-7 minutes. Once cooked, finish with the oregano.
As everything else cooks, halve tomatoes and chop scallions.
As everything comes together, toss chicken, orzo, tomatoes, scallions, and dressing to combine. Finish with the torn mint and pine nuts, and serve with a roasted veggie.