Yesterday, by some random chance, I stumbled upon a facsimile edition of the 1957 issue of this cookbook and managed to snap a photo of the meatloaf tips page.
For those with bad eyesight, here is a transcription:
Things You Can Do With Meatloaf
Spread 3 tablespons of catsup or chili sauce over top of loaf before baking.
When forming loaf, tuck in 3 hard-cooked eggs along the center.
When loaf is baked, frost the top with mashed potatoes. Sprinkle with paprika and broil until golden.
Shape meat loaf mixture into 8 small loaves and lay in shallow pan. Top each baby loaf with a thin slice of onion. Bake at 350 for 1 hour.
"Meat loaf that is left over makes the most wonderful sandwiches!" - Bucky