1. Preheat oven to 375°.
2. Cook turkey in a large nonstick skillet over medium-high heat until browned, stirring to crumble. Add onion, corn, and garlic to pan; sauté 2 minutes. Stir in chili powder, cumin, and chipotle; cook 30 seconds. Add beans and tomatoes to pan; cook 1 minute. Divide turkey mixture evenly between 2 (1 1/2-cup) ramekins coated with cooking spray.
3. Weigh or lightly spoon flour into a dry measuring cup; level with a knife. Combine flour, cornmeal, baking powder, and salt, stirring with a whisk. Combine milk and egg white, stirring with a whisk. Add milk mixture to flour mixture; stir just until moist. Spoon batter evenly over turkey mixture. Place the ramekins on a baking sheet. Bake at 375° for 25 minutes or until crust is browned.