Shepherd's Pie with Sweet Potato Topping

Ingredients

• 1 lb Beef bones
• 3.5 l Water, filtered
• 2 oz Fennel
• 1/4 lb Carrots
• 1 oz Celery
• 1 lb Beef, ground
• 2 tbsp Oregano, fresh
• 4 tbsp minced Ginger root
• 3 tbsp, minced Turmeric root
• 1/2 tsp Cinnamon
• 1/4 tsp Mace, ground
• 1/2 tsp Vanilla bean powder
• 4 tbsp Sage, fresh
• 1 pinch Sea Salt
• 1.5 lb Sweet potato
• 1 cup Water, filtered
• 4 tbsp Bread crumbs, plain, gluten free