First, follow directions to make bacon gravy below and saute veggies in butter, set aside. Line a large loaf pan with parchement paper. Add half bread cubes to pan. Blend eggs, cream, salt, garlic and onion together. Pour half egg mixture over bread cubes then top with half of the shredded cheese. Add the rest of of the bread cubes top with remaining cheese and cooked onion, celery, carrot, raw green onion and bacon. Pour remaining egg mixture over the full pan. Bake at 350 for 40 minutes.
To make bacon gravy use a deep frying pan and saute chopped bacon till done but not too crispy. Remove bacon for use in bread.
In a small bowl add the xantham gum to the half and half or milk and dissolve. Warm milk is best. Add to fry pan on med high heat and use a whisk to blend continuously until gravy is thick enough to spoon over sliced loaf pieces.
Remove the loaf from the pan and slice on a serving tray. Serve with Bacon Gravy on the side. (Berries would be a great keto friendly fruit to add as a side)
