Start cooking your rice according to package instructions.

In a large skillet over medium-high heat, add ground beef and cook for about 5-7 minutes until deep brown.

Reduce heat to medium, add soy sauce, brown sugar, garlic, and ginger, and cook for an additional 2 minutes.

While beef simmers, slice cucumbers, shred carrots, and sauté spinach until wilted, about 2-3 minutes.

Assemble bowls by spooning the beef mixture over rice, then top with cucumbers, carrots, and spinach.

(Optional) Garnish with sesame seeds or chopped green onions.