Preheat the oven to 400 degrees. In a mixing bowl, toss the potatoes and garlic with a drizzle of olive oil. Toss well. Season with salt and pepper. Place on a baking sheet and roast for 15 minutes, or until fork tender. Remove from the oven and cool completely. Using a mini food processor, combine the mayonnaise, mustard and lemon juice. Process until smooth. Season with salt and pepper. Add the cilantro and continue to process until incorporated. In a mixing bowl, toss the roasted potatoes and garlic, cilantro mayonnaise, sliced eggs, and red onions. Mix well. Season with salt and pepper. Cover with plastic wrap and refrigerate for 2 hours. Remove from the refrigerator and mix the salad. Re-season with salt and pepper if needed.
Season the ribs with salt and pepper. Place the ribs in a large pot and cover with water. Add 1 teaspoon of the crab boil. Over high heat, bring the liquid to a boil. Reduce the heat to medium and simmer for 30 minutes. Remove the ribs from the liquid and cool. In a food processor, fitted with a metal blade, combine the rest of the ingredients. Process until smooth, about 15 seconds. Scrape down the sides with a rubber spatula. Pulse two or three times. Preheat the oven to 350 degrees F. Place the ribs in a shallow roasting pan. Pour the pureed mixture over the ribs. Place the ribs in the oven and roast the ribs for about 1 1/2 to 2 hours or until the ribs are tender. Slice into individual ribs and serve with Cilantro and Roasted Potato Salad.