Preheat the oven to 400°F and line a baking sheet with parchment paper.
Combine olive oil, Dijon mustard, lemon juice, parsley, dill, chives, garlic powder, salt, and black pepper in a small bowl, mixing into a smooth herb paste.
Place salmon fillets on the baking sheet and spread the herb paste evenly over each fillet’s surface.
Bake salmon for 12 to 15 minutes until cooked through and flakes easily with a fork.
In a large bowl, combine salad greens, cherry tomatoes, cucumber, red onion, nuts, and feta cheese if using.
Whisk extra-virgin olive oil, white wine vinegar or lemon juice, honey or maple syrup, Dijon mustard, salt, and pepper in a small bowl.
Drizzle vinaigrette over the salad mixture and toss gently to evenly coat.
Divide salad among four plates and top each with a warm herb-crusted salmon fillet. Serve immediately.
Notes
Feel free to customize the salad with your favorite vegetables.
For a lighter option, you can skip the feta cheese.