Grill the Chicken: Heat a grill pan over medium-high heat. Cook the chicken for 5-6 minutes per side until golden and cooked through (165°F internal temp). Let rest for 5 minutes, then slice.
Assemble the Bowl: In a serving bowl, layer quinoa, cherry tomatoes, cucumber, red onion, and avocado.
Top with Chicken: Add the sliced grilled chicken over the quinoa mix.
Drizzle the Sauce: Spoon the lemon herb sauce over the chicken and veggies.
Finish & Serve: Sprinkle with feta cheese and sunflower seeds for extra flavor and crunch. Enjoy!