HEAT oven to 400°F. Lightly coat 12 muffin cups with no-stick cooking spray.
COMBINE flour, sugar and dry mustard in medium bowl. Stir in cheese. Make a well in the center. Whisk together egg, milk and oil in small bowl. Add all at once to flour mixture, stirring just until moistened.
FILL prepared muffin cups 1/3 full using about half the batter. Combine diced eggs and bacon. Divide evenly into muffin cups on top of batter. Top with remaining batter. Muffin cups should be about 2/3 full.
BAKE 20 to 25 minutes or until muffins are lightly browned. Serve hot.
Serving Size (1 muffin), Calories 180 (Calories from Fat 90), Total Fat 10g (Saturated Fat 3g, Trans Fat 0g), Cholesterol 65mg, Sodium 360mg, Total Carbohydrate 16g (Dietary Fiber 0g, Sugars 1g), Protein 7g; Percent Daily Value*: Vitamin A 4%, Vitamin C 0%, Calcium 10%, Iron 6%.
*Percent Daily Values are based on a 2,000 calorie diet.