Cod, Cheese & Leek Gratin

What is it?

Cod fillet sits in a cheese and leek sauce, then gets covered with crushed potatoes and baby spinach. It’s a frozen oven meal from Sainsbury’s, built around white fish rather than pasta or rice, so the texture moves from soft fish and sauce to a more textured potato topping. The spinach is tucked in as a side vegetable rather than mixed through. Compared with other Sainsbury’s frozen meals, this one leans into a gratin-style format, with the potato topping doing the job of a crust after baking.