Coat a nonstick skillet with cooking spray; place over medium-high heat until hot. Add green onions, bell pepper, and garlic; sauté 3 minutes or until tender. Stir in corn and next 5 ingredients; cook until heated. Remove from heat; set aside. Keep warm.
Combine flour, cornmeal, and chili powder in a medium bowl. Gradually add milk and eggs, stirring with a wire whisk until well-blended. Pour half of mixture into each of 2 (9-inch) pie plates coated with cooking spray (do not stir). Bake at 475° for 10 minutes or until puffed and browned.
Spoon half of pinto bean mixture into each pie shell; sprinkle each with cheese. Bake at 475° for 1 minute or until cheese melts. Cut each pie into 6 pieces. Garnish with sour cream and parsley, if desired. Serve immediately.