In a small bowl, mix crushed crackers and butter until blended; press half of the mixture onto the bottom of a greased 13-in. x 9-in. baking dish. Stir Parmesan cheese into remaining cracker mixture; set aside.
In a large bowl, mix the tomatoes, corn, 1 cup cheddar cheese, green pepper, green onions, bacon, sugar, garlic salt and pepper; carefully spoon over crust. Sprinkle with remaining cheddar cheese; drizzle with cream. Top with reserved cracker mixture.
Bake, uncovered, at 350° for 30 minutes, then broil on high for 5 minutes until crust is bubbly and golden brown.