In a large bowl, whisk together the olive oil with the salt, pepper, orange juice, cilantro, lime juice, agave, garlic and jalapeño. Taste and adjust seasoning as needed. Add the thinly sliced cabbage and mango, and toss to coat. Season with salt and pepper, and set aside.

Place the ribs in a large baking dish and cover with most of the Dr Pepper (leave about 1/2 cup of Dr. Pepper for later) Add the salt and soak the ribs for 2 -24 hours in the fridge.

Heat the oven to 350°F.

Remove the ribs from the liquid, place on a baking sheet and pat them dry. Give them a good rub with the chili powder. Pour 1 cup of water into the baking sheet, and cover tightly with foil. Bake for 2 hours, until the meat nearly falls off the bone.

While the ribs are in the oven, heat the oil in a small pot over medium heat. Saute the onion and garlic until they're soft and add the ketchup, brown sugar, Worcestershire, apple cider vinegar, cayenne, and remaining 1/2 cup of Dr Pepper. Simmer for 15 to 20 minutes, or until the sauce thickens.

Once the ribs have cooked for 2 hours, remove from the oven and fire up the grill. Liberally brush the ribs with bbq sauce. When the grill is hot, cook them for 7-8 minutes on each side so they get the nice charred flavor. Remove from grill and add more sauce if desired.