Foryoueats: Easy Shepherd's Pie

Ingredients

• 1 teaspoon salt, plus more to taste
• 3 large (1 1/2 to 2 pounds) potatoes , peeled and quartered
• 8 tablespoons (1 stick) butter, divided
• 1 medium onion, chopped (about 1 1/2 cups)
• 1 to 2 cups mixed vegetables, such as diced carrots, corn, or peas
• 1 1/2 pounds ground round beef
• 1/2 cup beef broth
• 1 teaspoon Worcestershire sauce
• Pepper and/or other seasonings of choice