Multicooker Directions: In Step 1, transfer the cooked fennel mixture to the inner pot of a 6-quart multicooker. In Step 2, stir the tomatoes, potato, water, clam juice, salt and saffron threads into the pot. Lock the lid; turn Pressure Valve to “Venting.” Cook on SLOW COOK [Normal] until the potato is tender, about 6 hours. Turn off the cooker. With the lid off, press SAUTÉ [Normal]. Bring the soup to a boil; stir in the shrimp. Cook, uncovered, until the shrimp are done. Finish Step 2.