Cook orzo according to package instructions. Drain and set aside
In a bowl, whisk together mustard, lemon juice, lemon zest, olive oil, dill, garlic, salt, and pepper, mix half into cooked orzo. Add shrimp to remaining marinade and toss to coat. Let marinate for 15–20 minutes
Heat a skillet over medium heat and cook shrimp for 2–3 minutes per side until pink and cooked through. Toss cooked shrimp with the orzo. Serve warm or at room temperature, enjoy!