Preheat your oven to 400°F (200°C).
Pat the chicken breast dry with a paper towel and season both sides with half of the sea salt, black pepper, rosemary, and thyme.
Heat 0.5 tablespoon of olive oil in an oven-safe skillet over medium-high heat.
Sear the chicken for 2-3 minutes per side until a golden-brown crust forms.
Transfer the skillet to the oven and roast for 10-12 minutes, or until the internal temperature reaches 165°F.
While the chicken is roasting, heat the remaining 0.5 tablespoon of olive oil in a separate pan over medium heat.
Add the sliced zucchini, yellow squash, and minced garlic to the pan and sauté for 5-7 minutes until tender-crisp.
Stir the lemon juice and the remaining salt, pepper, and herbs into the vegetable mixture.
Remove the chicken from the oven and let it rest for 5 minutes before slicing.
Serve the sliced herb chicken over the warm brown rice alongside the sautéed summer vegetables.