Preheat oven to 400 degrees. In a large skillet heat olive oil over medium high heat. Add onions, carrots, mushrooms, and artichoke hearts. Cook until golden brown about 7-8 minutes. Stir in garlic and cook for about 30 seconds. Whisk in broth, heavy cream and Arrowroot powder--bring to a simmer or until thickened. Add Chicken, Parmesan and Lemon Juice--salt and Pepper to taste. Pour the mixture into a medium sized baking dish. Sprinkle with Low Carb Bread Crumbs Bake at 400 degrees for 10-15 minutes or until brown and bubbly. Remove from oven and let rest for 10 minutes. Serves 5-6.