Make the ranch: In a bowl, whisk mayo, sour cream, and buttermilk until smooth. Stir in lemon juice, dill, chives, parsley, garlic, onion powder, salt, and pepper.
Adjust thickness with a splash more buttermilk. Chill while you prep the rest.
Prep the chicken dredge: Set up three shallow bowls. In the first, add flour.
In the second, beat the eggs. In the third, mix panko, garlic powder, paprika, oregano, salt, and pepper.
Bread the chicken: Pat chicken dry. Dredge in flour, shake off excess, dip in egg, then press into the panko mix to coat well.
Place on a plate to rest 5 minutes to help the crust stick.
Cook the chicken (pan-fry): Heat 1/4 inch of oil in a large skillet over medium to medium-high heat. Cook chicken 3–4 minutes per side until golden and cooked through (165°F). Transfer to a rack or paper towels.
Sprinkle with a pinch of salt while hot.
Alternative baking: Heat oven to 425°F (220°C). Place breaded chicken on a wire rack set over a baking sheet. Spray with oil.
Bake 12–16 minutes, flipping halfway, until crisp and cooked through.
Alternative air-fry: Air-fry at 390°F (200°C) for 10–12 minutes, flipping once, until golden and done.
Build the salad base: In a large bowl, combine greens, tomatoes, cucumber, red onion, and corn. Toss lightly with a little ranch to coat (don’t soak it yet).
Slice the chicken: Cut into strips or bite-size pieces. If you love extra crunch, leave some larger pieces so the crust stays intact.
Add avocado and cheese: Gently fold in avocado and cheese if using.
Add chicken on top. Drizzle with more ranch and finish with a squeeze of lemon.
Serve: Top with croutons or tortilla strips if you want extra crunch. Serve right away while the chicken is still crisp.