2 tsp. fresh thyme leaves, chopped, plus more for garnish
2 tsp. fresh rosemary, chopped
Juice of 1/2 lemon
Freshly ground black pepper
Lemon slices, for serving
Heat broiler and line a baking sheet with parchment. In a small bowl, mix together mustard, garlic, shallot, thyme, rosemary, and lemon juice and season with salt and pepper. Spread mixture all over salmon fillets and broil, 7 to 8 minutes.
Garnish with more thyme and lemon slices and serve.