Beef Pie

Modified from http://allrecipes.com/recipe/irish-shepherds-pie/detail.aspx

Ingredients

• 1 tablespoon olive oil
• 1 tablespoon butter
• 1/2 onion, diced
• 2 pounds ground beer
• 1/3 cup all-purpose flour
• salt and ground black pepper to taste
• 2 teaspoons minced fresh rosemary
• 1 teaspoon paprika
• 3 cloves garlic, minced
• 2 1/2 cups water, or as needed
• 1 (12 ounce) package frozen peas and carrots, thawed
• 5-6 potatoes, peeled and halved
• 1 tablespoon butter
• 1/4 cup sour cream
• 1/2 cup cheddar cheese, shredded
• salt and ground black pepper to taste
• 1 egg yolk
• 2 tablespoons milk

Directions

1. Preheat the oven to 375 degrees F (190 degrees C).
2. Place olive oil and butter in 12" cast iron skillet over medium heat. Stir in ground beef; brown the meat, about 10 minutes. Saute onion.
3. Stir in flour until incorporated, then mix in salt, black pepper, rosemary, paprika, and garlic; cook and stir until garlic is fragrant, 2 to 3 minutes.
4. Stir in water and scrape up any brown bits from the bottom of the skillet. Reduce heat to medium-low and bring mixture to a simmer; cook and stir until thick, about 5-6 minutes.
5. Remove meat mixture from heat and stir in peas and carrots until combined.
6. Spread meat mixture covering the bottom of the skillet and set aside.
7. Place potatoes into a large pan of salted water. Bring to a boil, reduce heat to medium, and cook until tender, about 15 minutes. Drain well and return potatoes to pan.
8. Mash butter, sour cream, and cheese into the potatoes. Mash until combined and potatoes are smooth. Season to taste with salt and black pepper.
9. Whisk together egg yolk and milk in a small bowl; stir into the mashed potato mixture.
10. Top the meat mixture in the skillet with the mashed potatoes and spread evenly to cover.
11. Bake in the preheated oven until the top is golden brown and sauce is bubbling up around the edges, 25 to 30 minutes.