Mince 4 garlic cloves and reserve. Mince remaining garlic clove, put it in a small bowl and cover with 1 tablespoon sherry vinegar.
02Heat 1 tablespoon oil over medium-high heat in a very large skillet or Dutch oven. Add chorizo and cook until browned all over, about 7 minutes. Transfer chorizo to a plate.03Add as many bread slices to pan as will fit in one layer. Cook until golden on both sides, about 2 minutes. Transfer croutons to a plate and sprinkle with salt. Heat a little more oil in pan and repeat with remaining bread slices, frying them in batches if necessary.04Heat remaining 2 tablespoons oil in pan. Add both paprikas and let cook for 20 seconds. Add onions and reserved 4 cloves minced garlic and cook until limp, about 3 minutes. Add bell peppers and sauté until onions are golden and peppers soft, about 7 minutes. Add cherry tomatoes, chicken broth, black pepper and bay leaf to pan and bring to a simmer. Cut chorizo in chunks and add it to pan along with any drippings from plate. Reduce heat to low, cover pan, and let cook at a low simmer for 25 minutes. Add remaining 2 tablespoons sherry vinegar to pan and simmer uncovered, until stew thickens slightly, 5 to 10 minutes longer.05Remove bay leaf and stir in reserved garlic-vinegar mixture and cilantro. Serve stew topped with croutons.