How to Make It
Combine 3 tablespoons oil, rind, juice, and garlic in a large bowl, stirring well with a whisk. Stir in 1/4 teaspoon salt.
Sprinkle fish with remaining 1/2 teaspoon salt and pepper. Heat a large nonstick skillet over medium-high heat. Add 1 1/2 teaspoons oil to pan; swirl to coat. Add 3 fillets, skin side down; reduce heat to medium, and cook 5 minutes or until skin is golden and crisp. Turn fillets; cook 3 minutes or until done. Remove fish from pan; keep warm. Wipe pan clean; repeat procedure with remaining oil and remaining 3 fillets.
Add arugula to dressing; toss. Top with onion and cheese. Serve salad with fillets and lemon wedges.
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