1. Preheat oven to 350 degrees Fahrenheit. Grease a baking sheet.
2. Place chicken cutlets in a resealable plastic bag. Add flour and shake to coat. Spread cutlets on prepared baking sheet.
3. In a small bowl, combine ketchup, vinegar, brown sugar, olive oil, mustard, garlic and two tablespoons sesame seeds. Pour over cutlets. Sprinkle with remaining sesame seeds.
4. Cover and bake for 30 minutes. Uncover and bake an additional 15 minutes.