Short Rib Shepherd's Pie Recipe - Hearty Food Ideas

Ingredients

• 2 tbsp vegetable oil
• Kosher salt and freshly-ground black pepper
• 10 oz cremini mushrooms, cleaned, trimmed, and quartered
• 8 oz cippolini or pearl onions, peeled and halved if large
• 1 1/2 Cups cups diced carrots
• 3 lbs Yukon Gold potatoes, peeled and cut into cubes
• 1/2 cup milk or half and half
• 4 tbsp unsalted butter, melted
• 1 3/4 cups shredded Dubliner cheese or sharp white cheddar cheese, divided
• Kosher salt and freshly-ground black pepper, to taste
• 3 large egg yolks
• 3/4 cup frozen peas
• 1 tsp fresh thyme leaves, chopped
• 1 tbsp Dijon mustard
• 1/2 cup fresh parsley, chopped