Cheddar Tuna Au Gratin

Cheddar tuna au gratin is the kind of pantry-staples casserole that earned its keep through decades of weeknight rotations. Canned tuna blended with cottage cheese makes the base unexpectedly creamy and high in protein, then a quick paprika roux turns into a smooth, golden cheese sauce that gets poured over the top. Bread cubes double up here, half mixed into the tuna for body, half on top with melted butter so they crisp into a craggy, golden crust. The trick to the sauce is the roux, cook the butter, flour, and paprika just until it smells nutty before adding milk slowly so you avoid lumps. The paprika is more than color, it adds a faint smoky depth that lifts canned fish out of its usual flat note. Quick, cheap, and ready in 45 minutes, this is what gets put on the table on a Wednesday when nobody planned anything.

Kitchen Tips

• Drain the tuna well, packing liquid will water down the casserole and dilute the cheese sauce.
• Warm the milk slightly before adding to the roux to prevent lumps from forming when it hits the hot fat.
• Use sharp cheddar rather than mild, the sharper the cheese the more it asserts itself against the bland fish base.
• Use stale bread for the topping if you have it, fresh bread soaks up too much butter and goes soggy rather than crisping.

Variations

• Stir in a handful of frozen peas or chopped cooked broccoli for some vegetable color and crunch.
• Swap cottage cheese for ricotta for a smoother, less curdy texture.
• Add a teaspoon of Dijon mustard or a dash of hot sauce to the cheese sauce for a sharper edge.