01 - Preheat the oven to 400°F. Line a baking sheet with parchment paper or aluminum foil.
02 - Pat the salmon fillets completely dry with paper towels. Place them skin-side down on the prepared baking sheet. Brush each fillet with olive oil and season evenly with salt and pepper.
03 - Bake for 12–15 minutes, or until the salmon flakes easily when tested with a fork and is just opaque in the center.
04 - While the salmon bakes, melt the butter in a medium saucepan over medium heat. Add minced garlic and sauté for 30 seconds until fragrant.
05 - Stir in the flour to create a roux. Cook for 1 minute, stirring constantly to prevent burning.
06 - Gradually whisk in the broth until smooth, then add the heavy cream. Continue whisking until fully incorporated.
07 - Add lemon zest, lemon juice, chopped dill, salt, and pepper. Simmer gently for 3–4 minutes until slightly thickened. Taste and adjust seasoning as needed.
08 - Remove salmon from the oven. Transfer fillets to serving plates and spoon the dill lemon sauce generously over each. Garnish with fresh lemon slices and additional dill sprigs. Serve immediately.