Preheat oven to 425 degrees F. Toss zucchini with 1 tablespoon olive oil, 1/2 teaspoon salt and 1/4 teaspoon pepper. Place on rimmed baking sheet and bake for 30 minutes, flipping halfway through the baking time.
Meanwhile, cook the orzo according to package directions.
For the dressing, put all the dressing ingredients in a mason jar and shake until fully combined. Set aside.
Toss cooked orzo, roasted zucchini and lemon dressing together in a large bowl. Enjoy hot, room temperature or cold.