Bring the chicken broth to boil in a medium sauce pan. Reduce to simmer and cover.
Add 2 tbsp olive oil to a large skillet. Add the leeks and cook until tender and starting to turn translucent.
Meanwhile, place the salmon in the oven to bake for 25-30 minutes.
Add the garlic to the shallots and cook 1 minute.
Add the rice and toast 2-3 minutes.
Deglaze the pan with the wine. Cook until the liquid has almost entirely evaporated.
Add 1 cup of chicken broth, stirring the rice frequently.
When most of the liquid has evaporated, add another cup of chicken broth and cook, continuing to stir frequently, until the liquid has evaporated. Repeat this process until most of the broth is gone and the rice a nice al dente (should have some tooth-feel and not be mushy).
Stir in the spinach, and parmesan cheese, mixing until the parmesan is melted.
Add the juice from the lemon, the lemon zest, cracked black pepper, and the remaining 2 tbsp of olive oil. Stir to combine.
Ladle the risotto onto 4 plates or shallow bowls and top each with ¼ of the salmon.