Marinate the chicken. In a bowl, combine olive oil, lemon zest and juice, garlic, oregano, cumin, smoked paprika, salt, and pepper.
Add the chicken and toss to coat. Let it marinate for at least 20 minutes or up to 8 hours in the fridge.
Prep your base. Cook the brown rice, quinoa, or couscous according to package directions. Fluff with a fork.
Toss with a little olive oil and a pinch of salt to keep it tender and flavorful.
Make the quick salad. In a mixing bowl, combine cucumber, tomatoes, red onion, olives, and parsley. Add red wine vinegar, olive oil, salt, and pepper. Toss and set aside so the flavors meld.
Stir together the sauce. Mix Greek yogurt, grated garlic, lemon juice, dill, and salt.
Adjust lemon and salt to taste. It should be tangy and creamy.
Cook the chicken. Heat a large skillet over medium-high heat. Add a thin layer of oil if needed.
Cook chicken 5–6 minutes per side for thighs (4–5 minutes per side for thin breasts), until browned and cooked through. Let rest for 5 minutes, then slice.
Assemble the bowls. Add a scoop of grains to each bowl. Top with sliced chicken, a generous spoonful of the salad, and a dollop of yogurt sauce.
Finish with feta, avocado, hummus, or a squeeze of lemon if you like.
Taste and adjust. Add a pinch more salt, another squeeze of lemon, or a drizzle of olive oil to bring everything together.