Preheat the oven to 425 degrees Fahrenheit / 220 degrees Celsius. Line a large sheet pan with parchment paper and lightly brush or drizzle it with olive oil.
In a small bowl, whisk together the olive oil, Dijon mustard, whole grain mustard, honey, lemon zest, lemon juice, shallot, garlic, paprika, crushed red pepper flakes, salt, and black pepper until well combined.
3 tablespoons extra virgin olive oil, 2 tablespoons Dijon mustard, 1 tablespoon whole grain mustard, 1 teaspoon honey, 1 small lemon, 1 1/2 tablespoons fresh lemon juice, 1 small shallot, 2 large garlic cloves, 1/4 teaspoon sweet paprika, 3/4 teaspoon kosher salt, 1/2 teaspoon black pepper, 1/4 teaspoon crushed red pepper flakes
Pat the salmon dry well. Place the fillets on the prepared sheet pan, skin-side down, with a little space between each one. Drizzle the tops lightly with olive oil and season with kosher salt and black pepper.
4 5- to 6-ounce skin-on salmon fillets, 1 tablespoon extra virgin olive oil, Kosher salt, Black pepper
Spoon the Dijon shallot sauce over the salmon fillets, letting some of it fall onto the pan around the fish too. Spread it gently over the tops so each piece is evenly coated. If using, pour the white wine onto the sheet pan around the salmon, not directly over the tops.
2 tablespoons dry white wine
Roast for 10 to 14 minutes, depending on the thickness of the fillets, until the salmon is just cooked through and flakes easily with gentle pressure. The top should look glossy and lightly golden, and the shallots should be softened and tender.
Transfer the salmon to a serving platter or plates. Spoon the pan juices and softened shallots over the top. Finish with the dill, chives, and a little extra lemon zest if you want it especially bright. Serve with lemon wedges and a tiny sprinkle of flaky sea salt, if using.