How to Make It
Season salmon with ½ teaspoon each salt and pepper.
Heat oil in a large nonstick skillet over medium-high. Cook salmon, skin side down, until opaque and cooked most of the way through, about 7 minutes. Flip and cook to desired doneness, about 3 minutes for medium-well. Transfer to a plate and let rest for 5 minutes. Break into large pieces and discard the skin.
Whisk buttermilk, mayonnaise, chopped basil, chopped mint, garlic, and remaining ¼ teaspoon salt in a small bowl. Toss together lettuce, radishes, basil leaves, mint leaves, and remaining teaspoon pepper in a large salad bowl. Top with salmon and drizzle with dressing.