Recipe: Instant Pot Meatloaf and Mashed Potatoes

Name: Recipe: Instant Pot Meatloaf and Mashed Potatoes
Ingredients: 2 pounds lean ground beef; 1/2 cups panko breadcrumbs; 1/3 cup whole milk; 1 small yellow onion, grated on the large holes of a box grater; 1 large egg, lightly beaten; 1 teaspoon kosher salt; 1/4 cup ketchup; 2 tablespoons packed ight brown sugar; 2 tablespoons Dijon mustard; 2 pounds large Yukon gold potatoes, peeled and quartered; 2 cups water; 1/2 teaspoon kosher salt; 1 cup half-and-half; 4 tablespoons unsalted butter