Use good quality tomatoes: I've had great results using the Mutti brand of canned tomatoes. Cirio is also a good one. Inferior quality tomatoes can result in an overly acidic sauce, so avoid using those!
Give the oven time to heat up: It's important to get the oven nice and hot before baking the dish. This means the mozzarella cheese melts without risking the gnocchi being overcooked.
Using frozen gnocchi? Thaw it in the refrigerator before beginning this recipe.
No oven proof skillet? You can transfer the gnocchi alla sorrentina mixture into an oven proof baking dish and then add the remaining mozzarella and parmesan cheese on top and bake until done.
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