01 - In a mixing bowl, whisk together olive oil, lemon juice, garlic, oregano, thyme, paprika, salt, and pepper. Add the chicken breasts, turning to coat evenly. Cover and refrigerate for at least 20 minutes, or up to 2 hours for deeper flavor.
02 - Heat olive oil in a saucepan over medium heat. Add the rice and stir for 1 minute to lightly toast the grains. Pour in the water and salt, bring to a boil, then cover, reduce heat to low, and simmer for 12 to 15 minutes. Remove from heat and let rest, covered, for 5 minutes. Fluff with a fork before serving.
03 - Grate half a cucumber and squeeze out excess moisture using a clean towel. Combine the grated cucumber with Greek yogurt, chopped dill, minced garlic, olive oil, lemon juice, salt, and pepper. Stir until smooth and refrigerate until ready to serve.
04 - Heat a grill pan or skillet over medium-high heat. Remove the chicken from the marinade and grill for 5 to 6 minutes per side, or until the internal temperature reaches 165°F. Transfer to a cutting board and rest for 5 minutes before slicing against the grain.
05 - Divide the fluffy rice among four bowls. Arrange sliced grilled chicken, diced cucumber, halved cherry tomatoes, red onion, Kalamata olives, and crumbled feta over the rice in sections. Spoon tzatziki generously over the top and finish with fresh herbs and lemon wedges.