Shepherd's Pie: Easy Ground Beef Dinner Ideas!

Ingredients

• 1 tablespoon olive oil (15 ml)
• 1 large onion, finely chopped (about 1 cup)
• 2 carrots, peeled and diced (about 1 cup)
• 2 celery stalks, diced (about 1 cup)
• 1 pound ground beef (450g), preferably 80/20 blend
• 1 teaspoon dried thyme (5 ml)
• 1 teaspoon dried rosemary (5 ml)
• 1/2 teaspoon salt (2.5 ml)
• 1/4 teaspoon black pepper (1.25 ml)
• 2 tablespoons all-purpose flour (30g)
• 1 cup beef broth (240 ml)
• 1/2 cup frozen peas (80g)
• 1/4 cup Worcestershire sauce (60 ml)
• 1 can (14.5 oz / 411g) diced tomatoes, undrained
• 2 pounds russet potatoes (900g), peeled and quartered
• 1/2 cup milk (120 ml), warmed
• 4 tablespoons unsalted butter (56g), softened
• Salt and pepper to taste