Bring a large pot of salted water to a boil and cook the brown rice penne according to package directions until al dente.
While the pasta cooks, season the chicken breast with sea salt and black pepper.
Heat the olive oil in a large skillet over medium-high heat and sear the chicken for 5-6 minutes per side until golden and cooked through.
Remove the chicken from the pan, let it rest for a few minutes, then slice into bite-sized pieces.
In the same skillet, lower the heat to medium and add the minced garlic and lemon zest, sautéing for 1 minute until fragrant.
Add the baby spinach to the skillet and stir until just wilted.
Drain the pasta, reserving a splash of the cooking water, and add the pasta to the skillet with the spinach and garlic.
Stir in the sliced chicken, lemon juice, fresh parsley, and fresh basil, adding a little pasta water if needed to coat everything evenly.
Toss well to combine and serve immediately.