Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
  6              large  tomato
     1/4      teaspoon  kosher salt
     1/4      teaspoon  pepper
  2        tablespoons  unsalted butter
  2        tablespoons  flour
     3/4           cup  milk
     1/4      teaspoon  dry mustard
     1/2           cup  sharp cheddar cheese
  2               cups  chives
  3                     egg white

Preparation:

cut 1/2-inch from the top of each tomato scoop out seeds and core sprinkle inside of shells with salt and pepper invert onto paper towels to drain heat butter in a saucepan, over a medium flame whisk in flour, until bubbly gradually whisk in milk heat and stir until thickened stir in mustard, cheese, and chives-mix well heat and stir until cheese melts remove from heat and allow to cool slightly gently fold in egg whites spoon into drained tomato shells set into a greased baking pan bake @ 400 degrees for 15-18 minutes, until tops are lightly browned remove from oven serve hot

Nutritional Information:

140 Calories (kcal); 9g Total Fat; (52% calories from fat); 7g Protein; 10g Carbohydrate; 24mg Cholesterol; 191mg Sodium