In a large skillet, cook ground beef over medium-high heat, breaking it up into small crumbles as it cooks. Drain excess fat.
Add garlic and cook 1 minute more.
In a small bowl, combine gochujang, soy sauce, brown sugar, and vinegar. Pour over beef.
Add spinach and cook until heated through and beef is glazed, 2-3 minutes.
Serve beef over white rice and garnish with sesame seeds, scallions, and kimchi. Enjoy!