3 tbsp. firmly packed Safeway Light Brown Sugar, divided3 tsp. ground allspice, divided2 tsp. kosher salt, divided, plus more to taste1 bone-in pork shoulder blade roast (3 1/2 lbs.), rinsed and patted dry8 green onions (4 oz.), coarsely chopped2 cloves garlic, peeled2 fresh jalapeño chiles...