cottage pie

Ingredients

• 2 pounds russet potatoes – peeled and cut into 1.5-inch chunks ( ~4.5 medium russet potatos )
• 1 tablespoon fine sea salt – for potato water
• 1/2 cup whole milk
• 4 tbsp unsalted butter – cut into pieces
• 1 tbsp olive oil
• 1 medium onion – finely chopped
• 1 large carrot – finely chopped
• 1 rib celery – finely chopped
• 2 cloves garlic – minced
• 1 1/2 pounds ground beef
• 2 tbsp tomato paste
• 2 tbsp all-purpose flour
• 1/2 cup red wine – dry
• 1 cup beef stock – low-sodium
• 1 1/2 tbsp Worcestershire sauce
• 1 tsp fresh thyme – chopped
• 1 leaf bay leaf
• 1/2 tsp black pepper – freshly ground