In the house where I grew up, my mother was a big-time name dropper when it came to what we ate. Our tuna was Bumble Bee, our bread was Wonder (yes, really), and our ketchup was Heinz. Always. And, though Wonder Bread is long gone from my pantry and I don't eat much canned tuna, I'm still a Heinz girl. When my husband Ted requested a turkey meatloaf, I considered many of the same flavor combinations I love in turkey meatballs, but in the end, I went traditional (almost) all the way, with ketchup as one of the primary seasonings. Any brand of ketchup will work; just make sure the one you choose is more tangy than sweet. Greek yogurt helps keep the meatloaf moist, and an egg holds it together. This turkey meatloaf passed the most important test; it sliced perfectly for sandwiches on the next day. Make it ahead and stash it in the freezer for a night when you don't have time to cook. Reheat in the oven or microwave.