Baked Tomato Pasta With Harissa and Halloumi.

Keeping a jar of store-bought pasta sauce in your pantry pays high dividends in this five-ingredient recipe. Jarred pasta sauce is ripe for enhancement; here, a confident amount of harissa injects not only spice, but also a deep smoky, savory tang. This is a versatile and adaptable weeknight baked pasta: You can experiment with different flavors of sauce to achieve a different finish; try vodka sauce for a creamier finish or arrabbiata for something spicier. Grating the halloumi allows the firm, salty cheese to melt evenly through the pasta. A hefty amount of dill brings much needed lightness to this dish, but you could substitute parsley or chives.