Heat 2 tablespoons olive oil in a large (12-inch) saute pan over medium-high heat. Add the scallions and zucchini and saute for 2 minutes. Add the garlic and cook for one minute. Lightly press most of the water out of the spinach and add it to the pan. Add the rice, basil, parsley, nutmeg, lemon juice, 2 teaspoons salt, and 1 teaspoon pepper and toss well. Transfer to the prepared baking dish.