Bacalao (Savory Salt Cod) Tacos

Ingredients

• 1 pound good-quality bacalao (salt cod)
• 2 tablespoons olive oil
• 2 medium white onions, chopped into ¼-inch pieces
• 1 28 ounce can tomatoes, preferably fire-roasted, undrained
• 4 large garlic cloves
• 1/2 cup chopped flat-leaf parsley
• 1/2 cup pitted green olives, thinly sliced
• 3 or 4 pickled jalapeños, stemmed, seeded and thinly sliced, plus more for serving
• 1/2 teaspoon dried marjoram
• 1/2 teaspoon dried thyme
• 2 bay leaves
• 4 medium (1 pound) boiling potatoes (like the red-skin ones), cut into ¼-inch pieces
• 16 warm corn tortillas