Method

Cut pieces of turkey bacon in ½ to make 4 pieces and place in a small skillet on medium heat. Or microwave according to package instructions.
When fully cooked, remove bacon, blot with a paper towel and set aside.
In that same skillet, spray with nonstick cooking spray and add your chopped spinach.
Sauté spinach and then add your egg whites and salt and pepper.
Scramble and cook mixture.
When egg whites are cooked, add cheese and mix thoroughly.
Place your sandwich thin in the toaster and toast.
Place egg/cheese/spinach mixture on bread half and top with turkey bacon slices, tomato slice and onion.

Nutrition
Per Serving (1 sandwich):
Calories: 303
Fat: 12g
Carbohydrates: 28g
Fiber: 8g
Protein: 26g
Sugars: 3g