Preheat your oven to 400°F and prepare a baking sheet with parchment paper.
Toss the broccoli florets with half of the avocado oil, garlic powder, salt, and pepper, then spread them in a single layer on the baking sheet.
Roast the broccoli for 15-20 minutes until the edges are tender and slightly charred.
While the broccoli roasts, rinse the quinoa under cold water and place it in a small pot with 1/2 cup of water or vegetable broth.
Bring the quinoa to a boil, then reduce heat to low, cover, and simmer for 12-15 minutes until the liquid is absorbed and the quinoa is fluffy.
Season the chicken breast with lemon juice, salt, and pepper.
Heat the remaining avocado oil in a grill pan or skillet over medium-high heat.
Grill the chicken for 6-7 minutes per side or until the internal temperature reaches 165°F.
Let the chicken rest for 5 minutes before slicing it into strips.
Assemble the bowl by placing the fluffy quinoa at the base, topped with the roasted broccoli and grilled chicken.