Sweet Potato Cottage Pie - RecipesNow!

Ingredients

• 1 1/2 pounds North Carolina sweet potatoes (about 2 large)
• 1 tablespoon olive oil
• 1 cup onion (chopped )
• 1/4 cup celery (chopped )
• 1 teaspoon garlic (finely chopped, 1 large clove)
• 1 pound ground beef (90% lean)
• 1 15 ounce can tomato sauce
• 1 tablespoon Worcestershire sauce
• 1 1/2 teaspoons thyme (fresh, or dried thyme, or herbes de Provence, divided)
• 1/2 teaspoon salt (divided)
• 1/2 teaspoon black pepper (ground, divided)
• 2 tablespoons butter
• 1 tablespoon milk