In bowl whisk together eggs, milk, seasoning, 1/2 tsp. salt, 1/4 tsp. black pepper, and crushed red pepper. Stir in chicken, Monterey Jack cheese, artichokes, spinach, tomatoes, half of the Parmesan, cooked pasta, and onion. Transfer to a 13x9x2-inch baking dish or 3-quart rectangular casserole.