Preheat oven to 400 degrees F. Place the beef bones on a baking sheet and roast for 1 hour.
In a large stockpot, combine the roasted bones, water, onion, carrots, celery, garlic, peppercorns, bay leaf, thyme, and salt. Bring to a boil, reduce heat, and simmer for 3-4 hours, skimming off any fat or scum that rises to the surface.
Remove the bones from the pot and strain the broth through a fine-mesh sieve into a clean pot. Discard the solids.
Return the broth to the stove and bring to a boil. Reduce heat and simmer for 1-2 hours, skimming off any fat or scum that rises to the surface.
Strain the consomme through a fine-mesh sieve and discard any solids. Allow to cool before serving.
Serving Suggestion
Serve the gluten free beef consomme with a sprinkle of freshly chopped parsley and a swirl of cream. Enjoy!