Prep the base: Cook your chosen base (cauliflower rice for fewer calories, quinoa or brown rice for more carbs). Fluff and set aside.
Make the light pesto: In a blender or food processor, add basil, spinach, Parmesan, nuts, garlic, lemon zest, lemon juice, and olive oil.
Pulse until roughly combined.
Adjust consistency: With the motor running, stream in broth or water until the pesto is smooth and spoonable. Season with salt and pepper. Taste and adjust lemon and salt.
Season the chicken: Pat chicken dry.
Toss with olive oil, garlic powder, onion powder, oregano, salt, pepper, and lemon juice.
Sear the chicken: Heat a large nonstick skillet over medium-high. Add chicken in a single layer. Cook 6–8 minutes, stirring occasionally, until browned and cooked through (165°F/74°C).
Toss with pesto: Reduce heat to low.
Add 3–4 tablespoons of pesto to the chicken and toss to coat lightly. Remove from heat. Reserve remaining pesto for drizzling.
Assemble the bowls: Divide your base between bowls.
Top with pesto chicken, tomatoes, cucumber, and broccoli. Drizzle with extra pesto.
Finish and serve: Sprinkle with nuts, add fresh basil, and squeeze lemon over the top. Serve warm or at room temperature.