Open-Face Tomato Tuna Melts

Yield: 4 servings
Equipment: bowl, rimmed baking sheet, broiler-safe rack
Time and setting: broil 2–4 minutes

Ingredients

2 cans (5 ounces each) tuna in water, drained
1/3 cup plain Greek yogurt
2 tablespoons mayonnaise
1 celery stalk, finely diced
2 tablespoons minced red onion
1 teaspoon Dijon mustard
1 teaspoon lemon juice
1/4 teaspoon pepper
4 slices sturdy whole-grain bread
4 tomato slices, patted dry
1 cup shredded cheddar

Method

Heat broiler with rack 6 inches from element. Mix tuna, yogurt, mayonnaise, celery, onion, mustard, lemon, and pepper.
Toast bread lightly on both sides under broiler.
Divide tuna among toasts. Add tomato and cheese.
Broil 2–4 minutes until cheese bubbles and tuna mixture reaches 165°F. Watch continuously. Rest 2 minutes.

Preparation notes

Read the full method, prepare the vessel, and arrange ingredients in order. Divide evenly and preserve every cooling or chilling period.

Substitutions

Canned salmon may replace tuna. Monterey Jack may replace cheddar.

Storage and safety

Refrigerate tuna mixture up to 3 days. Assemble just before heating. Refrigerate cooked leftovers within 2 hours and reheat to 165°F.

Planning and final quality checks

Measure every ingredient before starting and keep it in the listed condition—cold, softened, drained, cooked, or room temperature. Use the specified equipment capacity and divide the recipe for the stated yield. Begin checking at the low end of a time range, then rely on the visual cue and thermometer endpoint rather than minutes alone.

For equal portions, use a level scoop or mark sections before cutting. Complete the stated rest, cooling, or chilling period. When one substitution changes moisture or fat, avoid making several other changes in the same batch.

Label leftovers with the preparation date. Reheat only what is needed and avoid repeated warming and cooling. Check packaged ingredients for allergens and formulation changes. Optional toppings must remain separate and should not be used to infer points or nutrition.

Serving and transport

Inspect both surface and center before serving. Keep hot foods hot and dairy, egg, meat, and chilled salads refrigerated during transport. Use clean utensils for finished food after contact with raw egg or meat. An insulated carrier helps keep perishable food outside the temperature danger zone.

Portioning and presentation

Use the tool best suited to the finished texture: a wide spatula for tender baked portions, a level spoon for jars and salads, and a sharp knife for clean slices. Wipe the utensil between portions when neat edges matter. Keep crisp or juicy garnishes separate until serving so they do not soften or dilute stored food.

If preparing the recipe ahead, complete only the steps specifically covered by the storage instructions. Do not hold raw egg or raw meat mixtures at room temperature while other components are prepared. Wash hands, boards, knives, and counters after handling raw ingredients, and use a clean thermometer for the final temperature check.

Record any substitution when serving other people. Package formulas and allergen statements can change, so confirm labels each time. A substitution can also affect moisture and timing; make one change at a time and retain the stated doneness cue.

Open-Face Tomato Tuna Melts