Gently boil or steam the leeks for 5 minutes to soften.
Place the spinach leaves in a medium-sized baking tin and top with the leeks. Place the salmon on top.
Mix together the oil, garlic and ginger and liberally brush over the salmon. Squeeze the lemon juice over the salmon.
Place in the oven and bake for 10 minutes. Remove and allow to sit for 5 minutes.
Garnish with fresh coriander leaves. Goes well with Avocado dressing drizzled over the top.
To make the dressing, scoop the flesh from the avocados into a small food processor bowl. Add all the other dressing ingredients and blend until smooth. If necessary add a little cold water to form a smooth paste.