Set oven to 350 degrees and spray a baking sheet with non-stick cooking spray.  

Mix together flour and seasonings, making sure that all seasonings are distributed evenly. Set aside.

Place egg whites in a separate bowl. Dip each tomato in the egg white and then in the flour mixture. Be sure to lightly coat both sides.

Place on baking sheet. Bake for approximately 10 min on each side. Tomatoes should have a light brown crust on each side.

If you want crisper tomatoes, bake for an additional 3-5 minutes on each side. Enjoy!