Preheat your grill or grill pan over medium-high heat.
Pat the chicken breasts dry with paper towels and season with olive oil, salt, pepper, and garlic powder.
Grill the chicken for about 6-7 minutes on each side, or until fully cooked and the internal temperature reaches 165°F (75°C). Remove from the grill and let rest.
In a pot of boiling salted water, add the broccoli florets and cook for about 3-4 minutes until bright green and slightly tender. Drain and set aside.
In a mixing bowl, combine Greek yogurt, minced garlic, lemon juice, olive oil, and season with salt and pepper. Whisk until smooth to prepare the creamy garlic sauce.
Slice the grilled chicken into strips.
To assemble the bowls, divide the cooked broccoli evenly among four serving bowls. Top with sliced grilled chicken and drizzle generously with the creamy garlic sauce.
Garnish with fresh parsley if desired and enjoy!