Baked Potato Mash
4 large russet potatoes, scrubbed clean
¼ to ½ cup whole milk
2-½ tablespoons butter
½ teaspoon salt
Filling
1 tablespoon olive oil
½ medium onion, diced
8 ounces ground beef
2 tablespoons flour
1 cup beef broth
2 teaspoons Worcestershire sauce
1-½ teaspoons salt
¾ teaspoon black pepper
1-½ cups frozen vegetables