Put pork hocks in a kettle, cover with water
Add onion, carrot, celery, garlic, bay leaf, and seasonings
Bring to boil and lower to simmer for 2 - 3 hours
While pork hocks are simmering:
Put 2 cups of flour in a large (dry cast iron) frying pan
Put over medium heat, stirring constantly, until flour is browned (could take 40-50 minutes)
Sift the flour after browning
Combine pork, beef, and seasonings; roll into meatballs of about 1 1/2"
Roll meatballs in browned flour
After pork hocks have simmered for 2 hours, add meatballs to kettle
Simmer additional ½ hour
Add water to a small amount of browned flour, about 3 tablespoons, and whisk to a paste
Add flour & water mixture to kettle, stirring, a little at a time until broth is thickened (additional thickening will occur as the ragout cools).