Rinse the quinoa in a fine-mesh strainer to remove any bitterness.
In a small pot, combine the quinoa and water, bring to a boil, then reduce heat to low, cover, and simmer for 15 minutes.
Pat the salmon dry with paper towels and season both sides with half of the sea salt and black pepper.
Heat the olive oil in a non-stick pan over medium-high heat until shimmering.
Place the salmon in the pan skin-side down and sear for 4-5 minutes until the skin is crispy and releases easily.
Flip the salmon and cook for another 3-4 minutes until cooked through, then remove from the pan and set aside.
In the same pan, add the sliced zucchini and minced garlic, sautéing for 3-4 minutes until tender-crisp.
Stir in the lemon juice and fresh dill, tossing the zucchini to coat, and season with the remaining salt and pepper.
Fluff the quinoa with a fork and serve it alongside the salmon and zucchini, drizzling any remaining pan sauce over the fish.