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1
Preheat the oven to 400.
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2
Place 2 slabs of ribs, meaty side up, on each of 6 large broiler pans.
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3
Mix the sugar with 1 tablespoon of salt and sprinkle on both sides of the ribs; fold the ends under if necessary.
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4
Cover the pans tightly with foil.
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5
Set 1 pan of ribs on each rack in your oven (refrigerate the rest) and roast for 10 minutes.
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6
Reduce the oven temperature to 325 and roast for 1 1/2 hours longer.
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7
In a large bowl, whisk all the remaining ingredients together with 4 teaspoons of salt.
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8
Uncover the ribs and turn them boney side up.
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9
Brush 1 cup of the sauce over the ribs and bake, uncovered, for 30 minutes.
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10
Turn the ribs meaty side up and brush with another 1 1/2 cups of the sauce.
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11
Bake for about 1 1/2 hours longer, or until very tender; rotate the pans and baste once with about 1/2 cup of the sauce halfway through.
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12
Remove the ribs from the oven and lightly coat them with more sauce.
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13
Return the oven temperature to 400 and repeat with the remaining ribs and sauce.
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14
Reheat the ribs if desired.
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15
To serve, cut between the ribs, then transfer them to a warmed large platter.
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16
Pour any remaining sauce into a bowl and serve on the side.
