Combine olive oil, lemon juice, garlic, oregano, paprika, chili flakes, salt, and pepper. Toss chicken to coat. Marinate 30 minutes or up to overnight.
Toss cucumber, tomatoes, red onion, olive oil, lemon juice, herbs, salt, and pepper. Chill until ready to serve.
Grill or pan-cook chicken over medium-high heat for 5–7 minutes per side, until lightly charred and cooked through (165°F / 74°C). Rest briefly.
Divide rice, quinoa, or greens into bowls. Add a scoop of hummus, grilled chicken, and cucumber salad.
Finish with optional feta or olives and an extra squeeze of lemon.
