Preheat your oven to 400°F (200°C).
Pat the chickpeas dry with a paper towel, toss them with 1 teaspoon of olive oil and a pinch of sea salt, then roast on a baking sheet for 20 minutes until crunchy.
While chickpeas roast, whisk together the tahini, lemon juice, and 1 tablespoon of warm water in a small bowl until the dressing is smooth and creamy.
Season the salmon fillet with a pinch of salt and black pepper.
Heat the remaining 1 teaspoon of olive oil in a non-stick skillet over medium-high heat.
Place the salmon in the pan and sear for 4-5 minutes per side, or until the exterior is golden and the fish is cooked to your preference.
Place the mixed greens and sliced cucumber in a large serving bowl.
Top the greens with the seared salmon and the roasted crunchy chickpeas.
Drizzle the lemon-tahini dressing over the top and enjoy immediately.