Dice the chicken breast into 1-inch bite-sized pieces and season evenly with the sea salt, black pepper, and dried oregano.
Prepare the vegetables by chopping the broccoli into small florets, slicing the red bell pepper into thin strips, and cutting the zucchini into half-moons.
Heat the extra virgin olive oil in a large skillet over medium-high heat until shimmering.
Add the seasoned chicken to the skillet and sauté for 5-6 minutes, turning occasionally, until golden brown and cooked through. Remove the chicken from the pan and set it aside on a plate.
In the same skillet, add the broccoli, bell pepper, and zucchini. Sauté for 4-5 minutes until the vegetables are tender-crisp and vibrant.
Add the minced garlic to the vegetables and cook for 30 seconds until highly fragrant, being careful not to let it burn.
Return the cooked chicken to the skillet and drizzle the fresh lemon juice over the entire mixture.
Toss everything together for 1 minute to allow the flavors to meld and the lemon juice to create a light glaze. Serve immediately.