Marinate the Chicken: In a bowl, whisk olive oil, lemon juice and zest, garlic, oregano, cumin, smoked paprika, salt, and pepper. Add chicken and coat well. Marinate at least 30 minutes, up to 8 hours in the fridge for deeper flavor.
Cook Your Grain: Prepare quinoa, rice, or farro according to package directions.
Fluff with a fork. For extra flavor, stir in a drizzle of olive oil and a pinch of salt while still warm.
Make the Sauce: Stir together your chosen sauce ingredients until smooth. Add water 1 tablespoon at a time until it’s drizzleable.
Taste and adjust salt and lemon.
Prep the Veggies: Halve tomatoes, dice cucumber, thinly slice onion, chop herbs, and rinse and drain chickpeas if using. Keep components separate if you’re meal prepping.
Grill the Chicken: Preheat grill (or grill pan) to medium-high and oil the grates. Grill chicken 5–7 minutes per side, depending on thickness, until the internal temperature hits 165°F/74°C and the edges are charred.
Rest 5 minutes, then slice.
Assemble the Bowls: Add a base of grains, then top with sliced chicken, tomatoes, cucumber, onions, olives, chickpeas, and herbs. Add feta if using. Finish with a generous drizzle of sauce and a squeeze of lemon.
Meal Prep Option: Portion grains and chicken into containers.
Pack veggies and sauce separately or layer smartly: grains at the bottom, then chicken, then sturdy veggies like chickpeas and cucumbers. Keep juicy ingredients and sauce in separate containers for best texture.