How to Make It
Pat fillets dry with paper towels; sprinkle flesh side with 1/2 teaspoon salt and 1/4 teaspoon pepper. Heat 1 tablespoon oil in a large nonstick skillet over medium-high. Cook fillets, skin side down, 3 minutes. Reduce heat to medium; cook 2 minutes. Turn fillets; cook to desired degree of doneness, 1 to 2 minutes.
Whisk together vinegar, turmeric, mustard, honey, remaining 2 tablespoons oil, remaining 1/2 teaspoon salt, and remaining 1/4 teaspoon pepper in a large bowl. Add kale and beans; toss.
Divide salad evenly among 4 plates; top each with 1 salmon fillet and 1 tablespoon walnuts.