Preheat your oven to 350°F (175°C) and line a baking pan with aluminum foil.

Melt 2 tablespoons of butter in a skillet and sauté 1 diced medium onion until tender.

In a mixing bowl, combine 2 large eggs, ½ cup of milk, and 1 cup of Italian bread crumbs, and let sit for 5-10 minutes.

Incorporate the sautéed onions, 1 pound of lean ground beef, ½ cup of ketchup or chili sauce, 1 teaspoon of Italian seasoning, ¼ cup of chopped parsley, and season with salt and black pepper.

Shape the meat mixture into a loaf in the prepared baking pan and bake for 40 minutes.

Mix together ¼ cup of chili sauce and ¼ cup of ketchup for the topping.

Spread the topping over the meatloaf and bake for an additional 15-30 minutes until the internal temperature reaches 160°F.

Allow the meatloaf to rest for 10 minutes before slicing and serving.