Harrisa is a spicy, smooth paste made with chillies, tomatoes and garlic. I think it goes really well with fresh salmon.
You can place the onions and lemon slices on the salmon after spreading the sauce, but they can burn under the grill.
This is a very good recipe. I used the harissa recipe on this site - easy to make and tastes wonderful. Husband and teenage kids loved it. There were no left overs. - 29 Aug 2010 (Review from Allrecipes US | Canada)
I changed the recipe a little... I used some hot sauce, chili flakes and chili powder instead of the harissa as it seemed wasteful to make up a batch of it (even a small one) for just a teaspoon. The heat was still present, just less so. I used lemon pepper instead of regular black pepper. Substituted a finely diced green onion for the sweet onion called for. I used 3 tablespoons each of the orange juice and white wine thinking that it might 'steam' some of those flavours into the fish, but I didn't notice them. - 27 Sep 2010 (Review from Allrecipes US | Canada)
Loved it! Moist and tasty. Next time I'll add more Harissa for a stronger kick and make more sauce. The only complaint my family had was they wanted me to double the recipe because the dish was so yummy! - 22 Oct 2014 (Review from Allrecipes US | Canada)