3½ lb chicken, giblets removed
1 onion, peeled and quartered
1 rib celery, cut in chunks
2 tsp JF Universal Salt
3 garlic cloves, gently smashed
2 quarts cold water, more as needed
Preheat the oven to 400º. Place chicken, onion, and celery in a Dutch oven. Sprinkle JF Universal Salt over top.
Roast chicken, uncovered, in the preheated oven until chicken is no longer pink inside, the skin is browned, and an instant-read thermometer, inserted into the thickest part of a thigh, reads 160º; likely 45 minutes to an hour.
Transfer chicken to a plate until cool enough to handle. Once cool, pick the meat from the bones; set aside chicken breast meat in a bowl for another purpose. Cover bowl of breast meat with plastic wrap and refrigerate. Discard chicken skin. Remove chicken fat from Dutch oven, leaving the brown flavor bits in the bottom of the Dutch oven.
Place the Dutch oven over medium-high heat. Return chicken bones and dark meat from drumsticks and thighs to the pot. Add garlic cloves, and cold water. Bring to a boil, and use a spoon to scrape up and dissolve the brown flavor bits from the bottom of the Dutch oven. Reduce heat to low and simmer for 3 hours, adding more water if needed to retain same level.
As broth simmers, occasionally skim off and discard any foam that rises to the surface. Remove and discard bones, meat and vegetables. Strain broth through a fine mesh sieve to serve or use in recipes.