Sauté onion in a large nonstick skillet coated with vegetable cooking spray. Remove from heat.
Stir in cream-style corn and next 6 ingredients until blended; pour mixture into a lightly greased 2 1/2-quart baking dish. Sprinkle evenly with shredded Parmesan cheese.
Bake at 350° for 20 minutes or until mixture is thoroughly heated.
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