Prepare the components and mise en place. Slice the grilled chicken into even bite-sized strips so they heat uniformly and sit nicely on the salad. Halve the cherry tomatoes, slice the cucumber into 1/4" half-moons, thinly slice the red onion, dice the avocado, drain and rinse the chickpeas if from a can (pat dry). Having everything prepped keeps assembly fast and the avocado from over-handling, which prevents browning.

Warm the chickpeas (optional but recommended). Place the 1/2 cup cooked chickpeas in a small skillet over medium heat with a teaspoon of olive oil or butter for 2–3 minutes, stirring — just until they’re warmed and slightly glossy. Warming opens their surface starches, making them creamier and helping them absorb the dressing; it also brings out a nuttier aroma. Remove from heat and set aside.

Make the lemon-olive dressing. In a small bowl whisk together 1 tbsp extra-virgin olive oil, 1 tbsp fresh lemon juice, 1/2 tsp Dijon mustard, the minced garlic (if using), a pinch of salt and a few grinds of black pepper. Whisking emulsifies the oil and lemon so the dressing clings to the ingredients rather than pooling on the plate; mustard helps stabilize the emulsion and adds depth.

Taste and season the sliced chicken. Lightly drizzle a teaspoon of the dressing over the warm chicken and toss gently and briefly — this seasons the meat and echoes the salad’s citrus notes. Avoid over-marinating since the chicken is already grilled and you want to preserve its seared exterior and texture.

Assemble the salad base. In a large bowl gently toss the 2 cups mixed greens with half the dressing to barely coat the leaves — this prevents wilting and ensures even flavor. Layer the greens on a plate as the salad bed; leaving some dressing for finishing keeps the components distinct and fresh.

Arrange the toppings for visual appeal. Neatly fan or pile the sliced chicken on one side, mound the warmed chickpeas beside it, and place diced avocado, halved cherry tomatoes, cucumber slices and red onion in separate sections or artfully scattered. This restaurant-style plating keeps flavors identifiable so diners experience each component individually and together.

Finish and dress the salad. Spoon the remaining dressing over the chickpeas and vegetables (about half the remaining amount), then finish with a scatter of fresh parsley, a light pinch of flaky sea salt, and a few turns of freshly ground black pepper. Drizzling dressing selectively (rather than dousing everything) preserves texture — avocado stays silky, greens stay crisp, and chickpeas take on the tang.

Final warm-cold contrast (optional). If you like a contrast of temperatures, quickly warm the plated chicken for 15–20 seconds in a microwave or place the hot skillet near the plate to warm the chicken slightly. That small temperature difference enhances the perception of flavor — warm proteins release aromatics more readily against cool vegetables.

Serve immediately. Present the salad on a chilled or room-temperature plate so the greens don’t wilt from retained heat. Encourage diners to toss lightly at the table to combine textures and flavors before eating.