Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
  6                     tomato
     1/4      teaspoon  salt
     1/4      teaspoon  pepper
  2          teaspoons  unsalted butter
  2          teaspoons  flour
     3/4           cup  milk
     1/4      teaspoon  dry mustard
     1/2           cup  sharp cheddar cheese
  2          teaspoons  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 a cooling rack 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 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 serve hot

Nutritional Information:

106 Calories (kcal); 6g Total Fat; (47% calories from fat); 6g Protein; 8g Carbohydrate; 18mg Cholesterol; 201mg Sodium