Melt butter in a skillet. Cook onion and garlic in melted butter for 5 minutes, stirring occasionally. Place mixture in a large bowl to cool for 5 minutes.
Combine turkey, bread crumbs, egg, ¾ cup of the catsup, Worcestershire sauce, salt, and pepper with onion mixture.
Press meatloaf into an 8x4-inch loaf pan.
Spread remaining ¼ cup catsup on top.
Bake in a 350 degree oven for 50-55 minutes. (Internal temperature should reach 165 degrees.)
Remove from oven and let stand 5 minutes before serving.
Recipe by Sugar and Spice at https://kathleenssugarandspice.com/2013/11/21/turkey-meatloaf/