Peel and chop 2 to 3 medium russet or Yukon Gold potatoes into equal-sized chunks. Place them in a pot, cover with cold water, and add a pinch of salt. Bring to a boil and cook for about 15-20 minutes or until fork-tender. Drain potatoes and return to pot.

Add 2 tablespoons of unsalted butter and 1/4 cup of milk to the cooked potatoes. Mash until smooth, adjusting milk and butter as needed for consistency. Mix in any optional flavor enhancements.

In a large skillet, heat a tablespoon of oil over medium heat. Add 1 pound of ground beef, breaking it apart. Sauté for 5-7 minutes until browned. If using, add 1 diced onion and cook until translucent, adding minced garlic last for extra flavor.

Sprinkle 2 tablespoons of flour or cornstarch over the cooked beef, stirring to coat. Gradually add 1 cup of beef broth, stirring continuously. Cook until gravy thickens, about 5 minutes. Season with salt and pepper.

Remove gravy from heat once thickened. Spoon mashed potatoes onto serving plates, then pour gravy over. Enjoy your Ground Beef and Gravy Over Mashed Potatoes!