- 1 (5 ounce) can chunk light tuna, drained
- 2 tablespoons mayonnaise
- 1 teaspoon Dijon mustard
- 1 bagel, split and toasted
- 1/2 cup shredded Cheddar cheese
- 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.