Forge the Herbaceous Marinade: In a large bowl, whisk yogurt, lemon zest and juice, garlic, oregano, paprika, cumin, coriander, cayenne, black pepper, and 2 tbsp olive oil. Add chicken, coat well, cover, and refrigerate 30 minutes to 4 hours.
Prepare the Grain Foundation: Combine rinsed farro and broth in a medium saucepan. Bring to a boil, then simmer covered 25–30 minutes, until farro is tender-chewy. If liquid remains, drain; fluff with a fork, stir in chickpeas, and keep covered.
Construct the Crisp Salad: In a medium bowl, combine cucumber, tomatoes, red onion, olives, and feta. In a small jar/bowl, whisk 2 tbsp olive oil, 1 tbsp lemon juice, and dill. Toss with the salad just before serving.
Create the Cooling Cucumber-Dill Sauce: In a small bowl, mix yogurt, grated/squeezed cucumber, garlic, dill, lemon juice, and olive oil until smooth.
Broil the Marinated Chicken: Heat broiler to high; position a rack ~6 inches from heat. Thread chicken onto metal or soaked wooden skewers, leaving slight gaps. Discard any remaining marinade. Arrange skewers on a baking sheet; broil 5–7 minutes per side until lightly charred and the thickest pieces reach 165°F (74°C).
Assemble the Sun-Kissed Bowls: Divide warm farro-chickpea mixture among four bowls. Top with chicken (off skewers), a generous portion of Greco-salad, and a dollop of cucumber-dill sauce. Serve immediately.