Preheat the oven to 400°F (200°C) and line a baking sheet with aluminum foil.

In a medium-sized bowl, combine honey, Dijon mustard, lemon juice, minced garlic, olive oil, paprika, red pepper flakes, cayenne pepper (if using), salt, and cracked pepper. Mix well until smooth.

Place the salmon fillet on the prepared baking sheet and pour the honey mustard mixture over it, ensuring it is evenly coated.

Wrap the salmon tightly in aluminum foil to create a sealed packet.

Bake for 10-15 minutes, checking for doneness—salmon should be opaque and flake easily.

Open the foil and broil for an additional 2-3 minutes to caramelize the top.

Let it rest for a minute, then garnish with cilantro and serve with lemon slices.