Mushroom Zucchini Fritatta

Directions

1. In a large skillet, saute the onion, zucchini and mushrooms in butter until tender; drain. Transfer to an 8-in. square baking dish coated with cooking spray.
2. In a large bowl, whisk the eggs, milk, mustards, salt and pepper; pour over vegetable mixture. Sprinkle with cheese and bread crumbs.
3. Bake, uncovered, at 375° for 18-22 minutes or until set. Let stand for 5 minutes.