Sprinkle 1/4 teaspoon salt and 1/4 teaspoon pepper over fish strips; roll up each strip jelly-roll fashion, and set pinwheels aside.
Combine remaining salt, remaining pepper, zucchini, bell pepper, onion, oil, and Italian seasoning in a 9-inch glass pie plate; toss gently.
Arrange the fish pinwheels over vegetables, seam sides down, around edge of pie plate. Cover with heavy-duty plastic wrap, and vent. Microwave at high 7 to 8 minutes or until the fish flakes easily when tested with a fork, rotating dish a half-turn after 4 minutes. Let stand, covered, for 3 minutes. Garnish with the lemon slices and parsley sprigs, if desired.