Preheat the oven to 400°F. Line a baking sheet with parchment paper.
Place the salmon fillets on the prepared baking sheet. Drizzle with 1 tablespoon of olive oil and season with salt and pepper. Bake for 12-15 minutes or until the salmon is cooked through and flakes easily with a fork.
While the salmon is baking, prepare the barley according to package instructions if not already cooked.
In a small bowl, whisk together the crème fraîche, lemon juice, Dijon mustard, and remaining tablespoon of olive oil. Set aside.
In a large bowl, combine the cooked barley, cherry tomatoes, cucumber, red onion, and parsley. Toss gently to mix.
Once the salmon is done, flake it into large pieces.
To assemble, divide the barley mixture among bowls, top with flaked salmon, and drizzle with the crème fraîche dressing.