Preheat grill to medium-high heat.
Season the salmon fillet with salt, pepper, and a pinch of dried oregano.
Place salmon on the grill and cook for 4-5 minutes per side until flaky and opaque.
While salmon grills, rinse and drain the chickpeas.
In a large bowl, toss the arugula, cherry tomatoes, cucumber, and chickpeas together.
Whisk together the olive oil, lemon juice, and a pinch of salt to create a light dressing.
Drizzle the dressing over the salad and toss gently to coat.
Top the greens with the grilled salmon fillet.
Garnish with toasted sunflower seeds for a satisfying crunch.