01 - Preheat the oven to 400°F. Line a baking tray with parchment paper or lightly oil it.
02 - Place salmon fillets on the prepared tray. Brush with olive oil and season evenly with salt and pepper.
03 - Bake the salmon for 12 to 15 minutes, until just cooked through and flaky.
04 - Meanwhile, in a small saucepan over medium heat, melt the butter. Add minced garlic and sauté for one minute until fragrant.
05 - Stir in heavy cream, lemon zest, lemon juice, and Dijon mustard. Simmer gently for 2 to 3 minutes, stirring frequently.
06 - Incorporate chopped dill. Season with salt and pepper, then cook for an additional 1 to 2 minutes until the sauce slightly thickens.
07 - Plate the baked salmon fillets and spoon warm dill and lemon sauce over them. Garnish with lemon slices and extra dill if desired.