A comfort-filled classic, the traditional dish features a cast of hefty characters—cream, cheese, and noodles—and delivers nearly 700 calories and a day’s worth of sat fat with just one helping. In an attempt to introduce fresher ingredients while staying true to the classic, we start by bolstering the filling with meaty mushrooms, lots of aromatics, and herbs. Tomato paste adds a tangy counterpoint to the creamy, noodle-coating sauce, while Dijon mustard and lemon zest add zing. Canned tuna is a pantry staple that takes center stage in our remake (with just as many beneficial omega-3s as fresh). In lieu of a breadcrumb or potato chip topper, we use fresh dill and sharp cheddar to round out this dinner with bright flavor and cheesy goodness for less sodium.