Preheat oven to 450 degrees F. In large bowl combine rice, eggs, and pepper Jack cheese. Lightly coat a 12-inch pizza pan with nonstick cooking spray. Spread rice mixture evenly in pan. Bake for 20 minutes. Remove from oven; reduce oven temperature to 425 degrees F.
For topping, in large skillet cook celery, green pepper, and onion in hot butter over medium heat for 8 to 10 minutes or until tender, stirring occasionally. Stir in garlic, sausage, ham, and shrimp. Cook until heated through.
Spread drained salsa over rice crust, leaving a 1/2-inch border. Spread vegetable-meat mixture over salsa. Sprinkle with mozzarella cheese. Bake for 10 to 15 minutes or until heated through and cheese is melted. Cut into pieces to serve.