Drain tomatoes well, pressing between layers of paper towels; chop.
Sauté onion, bell pepper, and garlic in hot oil in a nonstick 12-inch ovenproof skillet 5 minutes or until tender; add tomato and zucchini, and saute 3 minutes. Stir in cream cheese until melted. Add pasta; toss to coat.
Whisk together eggs, 1/2 cup Parmesan cheese, milk, and next 3 ingredients. Pour over pasta mixture in skillet.
Bake at 375º for 25 to 30 minutes or until set. Sprinkle with remaining 1/4 cup Parmesan cheese. Let stand 10 minutes before serving.