Season chicken cubes with olive oil, salt, pepper, and dried oregano.
Grill chicken in a skillet or on a grill pan over medium-high heat for 8 to 10 minutes until fully cooked.
Steam broccoli florets in a steamer basket for 5 minutes or until tender-crisp.
In a saucepan, melt butter over medium heat and sauté minced garlic for 60 seconds.
Add heavy cream and garlic powder to the saucepan, simmering for 5 minutes until the volume reduces slightly.
Whisk in Parmesan cheese until the sauce is smooth and thickened, then remove from heat.
Portion cooked rice into four bowls.
Top each bowl with grilled chicken and steamed broccoli.
Drizzle the creamy garlic sauce evenly over the bowls.