01 - Whisk together the olive oil, lemon juice, minced garlic, oregano, thyme, paprika, salt, and pepper in a bowl. Add the chicken breasts, turning to coat thoroughly. Cover the bowl and refrigerate for at least 20 minutes, allowing flavors to penetrate the meat.
02 - Heat olive oil in a saucepan over medium heat. Add the rice and stir for 1 minute to toast the grains slightly. Pour in the water and salt, bring to a rolling boil, then cover tightly. Reduce heat to low and simmer for 12-15 minutes until liquid is absorbed. Remove from heat and let stand, covered, for 5 minutes before fluffing with a fork.
03 - Combine the Greek yogurt, grated cucumber, chopped dill, minced garlic, olive oil, and lemon juice in a mixing bowl. Season with salt and pepper to taste. Mix thoroughly until uniform and refrigerate until serving to allow flavors to meld.
04 - Preheat a grill pan or skillet over medium-high heat. Remove chicken from marinade and grill for 5-6 minutes per side. The chicken is done when the internal temperature reaches 165°F and the juices run clear. Transfer to a plate and rest for 5 minutes before slicing into strips.
05 - Divide the cooked rice evenly among serving bowls. Arrange the sliced grilled chicken, diced cucumber, cherry tomatoes, red onion, olives, and crumbled feta on top. Generously spoon the tzatziki sauce over the ingredients and finish with a garnish of fresh herbs and lemon wedges.