Prep the chicken: Pat chicken dry. In a bowl, mix olive oil, lemon juice, garlic powder, onion powder, smoked paprika, dill, parsley, salt, and pepper.
Coat chicken well. Let it marinate for 15–30 minutes (or up to 12 hours in the fridge).
Cook the grains: If using rice or quinoa, cook according to package directions. Fluff and set aside.
For a lighter bowl, chop crisp greens and keep them chilled.
Make the ranch: In a small bowl, whisk Greek yogurt, mayo, milk, lemon juice, Dijon, dill, parsley, garlic powder, onion powder, salt, and pepper. Adjust thickness with more milk. Taste and add a pinch of salt or lemon if needed.
Cook the chicken: Heat a large skillet over medium-high.
Add a light drizzle of oil. Cook chicken 5–7 minutes per side, until browned and the internal temp reaches 165°F (74°C). Rest 5 minutes, then slice or dice.
Prep the veggies: While the chicken cooks, slice tomatoes, dice cucumber, drain beans, and prepare corn and onion.
Slice avocado last to keep it fresh.
Assemble the bowls: Add a base of rice, quinoa, or greens. Top with chicken, beans, tomatoes, cucumber, corn, and onion. Add avocado.
Finish with ranch and herbs: Drizzle 2–3 tablespoons of the yogurt ranch over each bowl.
Sprinkle with cilantro or chives. Add a squeeze of lemon or lime.
Serve or store: Enjoy warm, or cool components and pack for meal prep. Keep dressing separate until ready to eat for best texture.