Pre-heat oven to 400F and line a baking sheet with parchment paper. Or, try out these "sizzle platters" from webstraurantstore.com - they can handle super high heat and make clean-up a breeze!
Place the sliced onion on the pan and top with the salmon filets.
Sprinkle the shwarma seasoning on top of the salmon.
and top with the shwarma tomato sauce and spread the harissa on top, if using.
In a small bowl, mix the shwarma tomato sauce, harissa (if using) and diced garlic cloves (also, if using). Spread on top of the salmon.
Lay the thinly sliced lemon slices on top of the salmon.
Bake for 45 minutes or until the salmon is cooked through and crispy on top.
Garnish with chopped green onion or cilantro or parsley - whatever you have on hand that will make a bright herby garnish!