How to Make It
Season pork all over with 1 1/4 teaspoons salt and 1/2 teaspoon black pepper, and place in a large ziplock plastic bag. Smash 3 garlic cloves, and add to bag with wine, bay leaves, and Pimentón. Seal and refrigerate 8 hours or overnight.
Preheat oven to 350°F. Remove pork from marinade, and pat dry. Remove and discard garlic and bay leaves; reserve remaining marinade. Heat 1 1/2 teaspoons oil in a large Dutch oven over medium-high. Add half of pork, and cook, stirring once or twice, until lightly browned, about 5 minutes. Transfer pork to a plate. Repeat with remaining half of pork. Chop remaining 3 garlic cloves, and add to Dutch oven with onion and remaining 1 1/2 teaspoons oil; cook, stirring often, until golden, about 6 minutes. Stir in crushed tomatoes, red pepper, and reserved marinade
Bring to a boil; reduce heat to medium-low, and simmer, stirring often, 3 minutes. Return cooked pork to Dutch oven; stir in 1 cup stock until pork is mostly submerged. Cover and bake in preheated oven until pork is fork-tender, 1 hour and 30 minutes to 2 hours.
Stir in potatoes and remaining 1 cup stock. Cover and bake until potatoes are tender, about 30 minutes.
Transfer Dutch oven to stovetop over high, and add clams. Cover and cook until clams open, 3 to 5 minutes. (Remove and discard any unopened clams.) Season with remaining 1 1/2 teaspoons salt and remaining 1/4 teaspoon black pepper. Garnish with cilantro. Serve with lemon wedges and crusty bread.