Garten explains that she likes to layer Rao's into her eggplant parmesan, as there's plenty enough prep to do for the recipe without factoring in homemade sauce.
This hack is a game-changer for other dinners too. Simmer your frozen chicken cutlets in it, use it as a saucy braising base for pork, or use it to make a tomato-rich panade.
There are plenty of ways to improve the jarred sauce as well, including adding some salted pasta water, fresh garlic, or another pantry item, canned clams.