Whisk together lemon juice, olive oil, dill, parsley, garlic, salt, and pepper to make the marinade.
Place salmon fillets on individual pieces of foil. Evenly distribute the marinade over the salmon, then top each fillet with lemon slices.
Fold the foil over the salmon, sealing the edges to form a packet.
Preheat the grill to medium heat (400ºF) and cook the foil packs for about 15 minutes or until the salmon flakes easily with a fork.
Open the packets carefully, serve immediately, and enjoy!