Preheat your oven to 400°F and line a large baking sheet with parchment paper for easy cleanup.
Halve the baby potatoes and chop the zucchini and red bell pepper into uniform, bite-sized pieces.
Spread the vegetables on the baking sheet and toss with one tablespoon of olive oil, salt, pepper, and dried oregano.
Roast the vegetables for 20 to 25 minutes, or until the potatoes are fork-tender and the edges are golden brown.
While the vegetables roast, season the chicken breast with salt, pepper, and a squeeze of fresh lemon juice.
Heat a grill pan over medium-high heat and lightly coat with the remaining half tablespoon of olive oil.
Grill the chicken for 6 to 7 minutes per side until fully cooked and an internal temperature of 165°F is reached.
Allow the chicken to rest for a few minutes before slicing it into strips.
Place the fluffy cooked quinoa in a bowl or on a plate and top with the roasted vegetable medley.
Add the sliced chicken on top and finish the dish with a drizzle of balsamic glaze for a sweet and tangy touch.