Prep the chicken: Pat chicken dry. Season both sides with smoked paprika, garlic powder, cumin, chili powder (if using), 1 tsp salt, and 1/2 tsp pepper.
Sear the chicken: Heat 2 tbsp olive oil in a skillet over medium-high. Cook chicken 4–6 minutes per side until browned and cooked through.
Rest 5 minutes, then slice.
Make the dressing: In a small jar, combine lemon zest, lemon juice, 3 tbsp extra-virgin olive oil, Dijon, minced garlic, a pinch of salt, pepper, and red pepper flakes. Shake until emulsified.
Prep the veggies: Halve tomatoes, dice cucumber, and thinly slice red onion. Chop herbs if using.
Assemble the bowls: Divide greens between 2–3 bowls.
Top with sliced chicken, tomatoes, cucumber, and onion.
Add avocado: Slice avocados just before serving. Fan over each bowl and season with a pinch of salt.
Dress and serve: Drizzle dressing over each bowl. Garnish with herbs.
Taste and adjust salt and lemon to preference.