Add ground beef and onion to a large skillet over medium-high heat and cook for 6-8 minutes, breaking up meat, until meat is cooked through and onion is tender. Add garlic and ginger paste then cook for an additional minute. Drain excess grease.

Stir in teriyaki sauce and bring to a low simmer. Let cook for 3-5 minutes until heated through and sauce slightly thickens.

Garnish with green onion before serving.