This easy zucchini tuna melt swaps traditional bread for golden, cheesy baked zucchini rounds. Creamy cream cheese, bright lemony tuna, fresh avocado, and a sprinkle of chili flakes create a light yet satisfying melt that is full of flavor.
Why You’ll Love This Recipe
- Low-carb alternative to classic tuna melts
- Crispy cheesy zucchini base with creamy filling
- Fresh, bright flavors from lemon and avocado
Key Ingredients & Substitutions

- Zucchini: Fresh medium zucchini works best; yellow squash can be used in a pinch.
- Cheese: Mozzarella or a mozzarella-cheddar blend melts beautifully; use your favorite melting cheese.
- Cream cheese: Softened for easy spreading; Greek yogurt mixed with a little mayo works as a lighter option.
- Tuna: Canned tuna in water or oil, well drained; leftover cooked fish can substitute.
- Avocado: Ripe but firm for clean slices; omit if preferred and add extra lemon.
Quick Expert Tips
- Slice the zucchini evenly so it cooks at the same rate and crisps properly.
- Bake on a wire rack for better airflow and golden edges.
- Drain the tuna thoroughly to keep the filling from becoming watery.
Recipe Card
- Prep Time: 10 mins | Cook Time: 20 mins | Total Time: 30 mins | Servings: 2–3 | Calories: 380
- Ingredients:
- 2 medium zucchini
- 100–120 g shredded mozzarella or melting cheese
- 80–100 g cream cheese, softened
- 1 can (160–180 g) tuna, drained
- Juice of ½ lemon
- 1 ripe avocado, sliced
- Red pepper flakes, to taste
- Salt and black pepper to taste
- Olive oil spray or light oil for the tray
- Equipment:
- Sharp knife
- Baking sheet with wire rack
- Spatula
- Mixing bowl
- Instructions:
- Preheat the oven to 200°C (400°F). Slice the zucchini into thin, even rounds about 5 mm thick.
- Lightly oil a wire rack set over a baking sheet. Arrange the zucchini rounds in a single overlapping layer to form a roughly rectangular base. Sprinkle evenly with the shredded cheese.
- Bake for 15–18 minutes until the cheese is bubbly and golden and the zucchini edges are lightly crisp. Remove from the oven and let cool for a couple of minutes.
- Carefully transfer the baked zucchini cheese base to a clean surface or parchment. Spread a generous layer of softened cream cheese over one half.
- Flake the drained tuna over the cream cheese. Squeeze fresh lemon juice over the tuna and season lightly with salt and pepper.
- Top with sliced avocado and a sprinkle of red pepper flakes. Fold the other half of the zucchini base over the filling to form a melt. Slice and serve warm.

Storage & Reheating
- Refrigerator: Best eaten fresh. Store leftover components separately in airtight containers for up to 1 day.
- Freezer: Not recommended, as the zucchini becomes watery when thawed.
- Reheating: Warm the zucchini base in a 180°C oven for 5 minutes to restore crispness before assembling.
Final Thoughts
This easy zucchini tuna melt is a fresh, lighter take on a classic comfort sandwich. Cheesy, creamy, and bright with lemon and avocado, it makes a satisfying lunch or light dinner. Give it a try and let me know how it turned out. Leave a 5-star rating and a comment below if you make it!