I don't mean metaphorically...I mean literally.
It might be the only way to survive famine. But you'll need to stock up on vitamins and minerals that can last a few years. Human flesh might be able to provide enough calories and macronutrients like protein, fat, and all meat has a little sugar or it should have trace amounts of sugar. But it isn't really a nutrient dense meat.
Here's the charts on how to cut humans apart for really prime selections of meat!

Now, let's talk about how to season it so it's really tasty in a time of scarcity!
#1: Simple and Traditional
Bring out the sea salt after letting it cook. Sea salt makes any meat more tasty!
#2: American BBQ Style
Brush it with BBQ Sauce and then BBQ it for a traditional American BBQ with a cannibalistic spin
#3: Italian Style
Brush it with Extra Virgin Olive Oil, Oregano, and Garlic for a savory flavor. Add a hint of Peperoncino if you want to add a little spice to the flavor.
And if you spot any Canadians, they are the new bacon!
Canadian Bacon with Maple Syrup:
Slice the Canadian Meat into really thin slices, fry it on the stovetop, and once cooked, soak the tender flesh in pure Grade A maple syrup. Enjoy for a sweet, hearty breakfast. Don't waste the melted human fat because with butter being scarce, you can use the human fat for baking purposes and other culinary uses.
Obviously, this is in the joke section for a reason. It's not to be taken seriously...