Place the ribs on a cookie sheet.

In a small bowl combine the sea salt, black pepper, paprika, brown sugar, mustard powder, and chili powder. Mix well. Rub the seasoning all over the ribs, coating them evenly.

Cover the ribs with plastic wrap and refrigerator for 12-24 hours.

Preheat the oven to 350 degrees. Place the ribs in a 9 x 13 glass baking dish. Add 1 cup of water and 1 cup of Dr Pepper. Cook for 2 hours, checking on the ribs occasionally to make sure there is still liquid in the baking dish. If not, add equal parts of water and Dr Pepper to the dish.

Meanwhile, make the BBQ sauce by heating the olive oil in a medium saucepan over medium heat. Add in the garlic and onions and saute for 4-5 minutes or until they have softened and are fragrant.

Add the ketchup, Dr Pepper, Worcestershire sauce, and white vinegar. Bring to a boil and then reduce heat to a simmer. Simmer for 20-25 minutes or until the sauce has thickened. Remove from heat and stir in the salt, black pepper, and cayenne pepper.

Heat an outdoor grill to high heat. Take the oven cooked ribs and place them on the grill, meat side down. Slather with the homemade BBQ sauce and cook for 10 minutes. Flip the ribs over onto the other side, slather with more BBQ sauce and cook for 10-15 minutes or until the ribs looks slightly charred.

Remove from the grill and serve along with addition BBQ sauce.