01 - Mix olive oil, lemon juice, garlic, oregano, paprika, salt, and pepper in a bowl. Add chicken breasts and turn to coat evenly. Marinate for at least 20 minutes.
02 - Place kale in a large bowl. Drizzle with olive oil, lemon juice, and a pinch of salt. Massage with hands for about 1 minute until leaves are slightly softened and bright green.
03 - Halve the cherry tomatoes, dice the cucumber, and thinly slice the red onion. Slice the avocado just before serving to prevent browning.
04 - Whisk Greek yogurt, olive oil, lemon juice, honey, Dijon mustard, salt, and pepper in a small bowl until smooth and well combined.
05 - Heat a grill pan or skillet over medium-high heat. Cook marinated chicken for 6–7 minutes per side until cooked through. Remove from heat and let rest for 5 minutes before slicing.
06 - Divide the massaged kale among 4 bowls. Top each with sliced chicken, cherry tomatoes, cucumber, red onion, avocado, and feta cheese. Drizzle with dressing and serve immediately.