A delicious tuna melt with some Dijon mustard to spice things up. Positively kid-friendly!
Preheat oven to 300 degrees F (150 degrees C).
Combine the tuna, mayonnaise, and mustard in a medium bowl, using a fork to mash the ingredients together.
Top each bagel half with half of the tuna mixture. Sprinkle the tops with shredded Cheddar cheese. Place bagel halves on a baking sheet.
Bake the bagel halves in preheated oven until the cheese melts, about 5 minutes.
Per Serving: 784 calories; protein 55.5g; carbohydrates 33.2g; fat 46.7g; cholesterol 120.7mg; sodium 1077.4mg.