Sweet Potato Shepherd's Pie

Name: Sweet Potato Shepherd's Pie
Prep time: 10 min
Cook time: 20 min
Total time: 30 min
Cuisine: American
Ingredients: 1 pound Ground Chicken (Use Lamb for a more traditional flavor, or half Italian Sausage for some funky awesomeness ); 1 tablespoon butter; 1 Onion; 2 cloves garlic; 3 tablespoons Tomato Paste; 1 tablespoon Worcestershire Sauce; 1 tablespoon Red Wine Vinegar; 1 tablespoon Fresh Rosemary; 1 quart low sodium beef stock; 4 tablespoons Cornstarch; 1 pound Mixed Vegetables; 4 cups Cooked Sweet Potato * (Cooked Spaghetti Squash great here too); 1/3 cup Parmesan cheese; 1 tablespoon Garlic Powder; 4 oven safe bowls or a 12” cast iron skillet