Toss drained canned tuna in the glass baking dish with 3 cheap pantry items to create a comforting bake so good your husband will be begging for more!

This 4 ingredient low carb cheesy casserole using canned tuna is the kind of cozy, no-fuss dinner that fits right into a busy weeknight. It comes together in the same glass baking dish you serve it in: you just toss drained canned tuna with three simple pantry staples—mayonnaise, shredded cheese, and a sprinkle of dried seasoning—then bake until it’s bubbly and golden. It’s budget-friendly, kid-pleasing, and has that creamy, cheesy comfort that makes everyone at the table go back for seconds.

Serve this casserole hot right from the oven with a bright, crunchy side to balance the creamy richness. A simple green salad with a tangy vinaigrette, sliced cucumbers and cherry tomatoes, or steamed broccoli all work beautifully. If you’re not strictly low carb, you can add a basket of buttered toast or garlic bread for dipping into the cheesy edges. A bowl of tomato soup on the side also turns this into a cozy, diner-style meal that feels extra comforting on chilly nights.

Servings: 4

3 (5-ounce) cans tuna in water, well drained

Preheat your oven to 375°F (190°C). Lightly grease a 2-quart glass baking dish with cooking spray or a little butter so the casserole doesn’t stick.

Open the cans of tuna and drain them very well, pressing the lids gently to squeeze out excess liquid. This helps keep the casserole from getting watery.

Scatter the drained tuna evenly across the bottom of the glass baking dish, breaking up any large chunks with a fork but leaving some texture. You want a fairly even layer of tuna covering the bottom.

In a medium bowl, stir together the mayonnaise, 1 1/2 cups of the shredded cheese, and the dried Italian seasoning until you have a thick, creamy mixture.

Spoon the cheesy mixture over the tuna in the baking dish, then use the back of the spoon to spread it out so it completely covers the tuna. It’s fine if some tuna peeks through in spots, but aim for a generous blanket of the creamy mixture.

Sprinkle the remaining 1/2 cup shredded cheese evenly over the top, creating a thick, pale layer of cheese that covers most of the surface. This is what will melt into that irresistible cheesy crust.

Place the glass baking dish on the middle rack of the preheated oven and bake for 18–22 minutes, or until the casserole is bubbling around the edges and the cheese on top is melted and just starting to turn golden in spots.