3 pounds well-trimmed (of fat layer) oxtail
1/2 teaspoon kosher salt
1/4 teaspoon black pepper
1/4 cup all purpose flour
oil
1 large carrot, peeled and cut into 1 inch pieces
1 large celery stalk, cut into 1 1/2 inch pieces
1 small onion, peeled and chopped into 1 inch pieces
4 whole large garlic cloves, peeled and slightly crushed
5 sprigs' worth fresh thyme leaves (or 1.5 teaspoons dried)
1 large bay leaf
2 teaspoons chopped fresh rosemary (or 1 teaspoon dried)
1 cup semi-dry (or just not sweet) wine, white or red is fine
1 1/2 cups unsalted stock, beef or chicken
1 1/2 Tablespoons tomato paste
1 teaspoon kosher salt plus more if needed for seasoning
1 teaspoon sugar