How to Make It
Heat a large skillet over medium-high heat. Add oil; swirl to coat. Add onion, fennel, and garlic to pan; cook 3 minutes or until soft. Add wine and tomato paste to pan, stirring well; bring to a boil. Cook 2 minutes, stirring occasionally.
Carefully pour onion mixture into a 6-quart electric slow cooker. Add 1/2 cup water and next 8 ingredients (through boxed tomatoes) to slow cooker. Cover and cook on LOW for 7 hours.
Uncover; discard lemon rind and bay leaves. Stir in cod, scallops, shrimp, and lemon juice. Cover and cook on LOW 13 to 15 minutes or until fish flakes easily when tested with a fork. Garnish with fresh basil.
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