Turkey Shepherds Pie

Ingredients

• 3 tablespoons olive oil
• 1 medium leek, halved and sliced thin
• 1/2 small onion, diced small
• 1 1/4 pounds ground turkey
• 1 tablespoon all-purpose flour
• 2 teaspoons garlic powder
• 1/2 teaspoon poultry seasoning
• 2 teaspoons fresh thyme leaves, minced
• 1 teaspoon salt
• 1 teaspoon black pepper
• 1 1/4 cups chicken broth
• 2 cups frozen mixed vegetables
• 2 cups frozen corn
• 1 cup frozen pearl onions
• 3-4 cups leftover mashed potatoes