Shepherd's Pie – Fustini's Oils & Vinegars

Ingredients

• 2 tablespoons Fustini's Robust SELECT olive oil
• 3 tablespoons butter
• 1 medium onion, diced
• 3 medium carrots, peeled, and sliced
• 1 celery stalk, chopped
• 1/2 pound mushrooms, quartered
• 2 garlic cloves, minced
• salt and pepper to taste
• 3/4 teaspoon dried oregano
• 3 tablespoons tomato paste
• 1 pound ground beef
• 1/4 cup beef broth
• 1/2 teaspoon Worcestershire sauce
• 4 cups mashed potatoes
• 1/4 cup parmesan, grated (optional)
• 1 1/2 pounds Russet potatoes, peeled, quartered
• Kosher salt and pepper to taste
• 3/4 cup milk
• 2 tablespoons butter
• 3 tablespoons Fustini's Butter olive oil
• 2 tablespoons fresh flat-leaf parsley, chopped