Preheat your grill to medium-high and brush off any food particles from the last time you grilled using a wire brush.: As the grill warms you will notice a rising heat that softens the metal and a faint scent from previous cooks, which is why a quick wire brush run helps create a clean surface. A properly preheated grill sears gently and creates that faint smoky note without sticking, ensuring the exterior of the foil packet kisses the grates instead of clinging. A common mistake is not letting the grill reach temperature, which can lengthen cooking time and reduce the pleasant char you want. I find the grate should be hot enough that a drop of water sizzles and evaporates quickly, signaling readiness.
Place the salmon fillets on one large sheet of foil (or multiple sheets of foil for easier grilling). Drizzle with avocado oil and use your hands to coat the flesh of the salmon in oil. Sprinkle with Herbs de Provence (or Italian seasoning), and sea salt. Place lemon slices on top of the salmon fillets and wrap in foil to create a foil packet.: When you lay the salmon on the foil, you will feel the cool, slightly slippery texture of the fish against your fingertips, and the fillets should sit flat without folding. Arrange them with small gaps so heat circulates inside the packet and the lemon slices make contact with the flesh. If you crowd the pieces, steam pockets can form unevenly and lead to inconsistent doneness, so avoid stuffing too many pieces on a single sheet. The foil also captures juices, so the packet will puff slightly as steam builds.
Place foil packet on the grill and cover the grill. Cook for 10 to 15 minutes, or until salmon is cooked through (or reaches desired done-ness). Cook times will vary depending on the thickness of the salmon.: Rubbing the avocado oil over the fillets creates a sheen that helps herbs and salt adhere, and it contributes to moistness during cooking. You will notice the surface glistening and the herbs clinging once the oil is distributed. Skipping this step can leave the fish drier and the seasonings patchy, so take a moment to ensure even coverage. The oil also helps transmit heat evenly across the flesh, promoting a uniform finish.
Use tongs or a metal spatula to remove foil packet from the grill and set it on a plate or cutting board. Allow it to cool enough to handle, then unwrap the foil.: As the dried herbs hit the oiled surface, they release a warm herbal aroma that hints at the final flavor. The salt dissolves into the oil and begins to work on the proteins, seasoning the fish more effectively than dry application alone. Over-salting is a frequent error here, so measure carefully and taste other components of the meal to keep balance. Even distribution ensures every bite has a consistent herbal lift.
Serve salmon with choice of side dishes.: Laying the thin lemon rounds on the fillets adds bright aromatics as their oils warm, and wrapping the foil seals the steam that cooks the fish gently. When you fold the foil, you will hear a faint crinkle and feel the packet firm up as air is expelled; this is normal and signals a good seal. A common mistake is folding too loosely, which can let steam escape and lead to drier fish, so press edges firmly to form a seal while leaving a little room inside for circulation.
Place foil packet on the grill and cover the grill: As the packet hits the hot grate, you may hear a subtle hiss from trapped moisture touching the metal, and the foil will warm rapidly. Closing the grill lid creates an oven-like environment that cooks through steam and radiant heat, keeping the salmon tender. Avoid lifting the lid frequently, as heat loss prolongs cooking; I once kept peeking and added extra minutes unnecessarily. Steady heat preserves the texture and integrates the herbs and lemon aroma into the flesh.
Cook for 10 to 15 minutes, or until salmon is cooked through (or reaches desired done-ness): During this time you can expect the packet to slightly swell and the scent of citrus and herbs to intensify. The salmon will transition from translucent to opaque, and a gentle flake will form when tested with a fork. Avoid relying solely on time, because thickness affects doneness; instead check visual cues and a gentle flake test. A common pitfall is overcooking, which dries the fish, so remove it as soon as it flakes easily and still looks moist inside.
Use tongs or a metal spatula to remove foil packet from the grill and set it on a plate or cutting board: When you lift the packet, you will feel the warmth through the tool and hear a satisfying weight from the steamed contents. Resting on a plate allows residual steam to settle and temperatures to equalize slightly, making the foil safer to open. Opening too soon can release a rush of hot steam that can scald, so give it a minute to cool. The packet will be juicy inside, so place it on a surface that can catch any escaping liquid.
Allow it to cool enough to handle, then unwrap the foil: As the steam calms and the foil cools, the aroma will mellow into a concentrated citrus and herb perfume. Carefully peel back the foil so juices remain in the packet instead of spilling everywhere. A frequent error is ripping the foil quickly, which sends a burst of steam toward your face; I always open at an angle away from myself to avoid that. The uncovered salmon will look glossy and flaky, ready for serving.
Serve salmon with choice of side dishes: The finished salmon will have a tender, flaky texture and a mild herb and lemon flavor. Present it directly from the foil for a casual touch or transfer to warmed plates for a neater look. Pair with something that complements the brightness, and remember that overly heavy sides can overwhelm the delicate fish. A simple garnish or extra lemon wedge can lift the dish further.
