Slow Cooker Bulgogi

Ingredients (8)

• ✓ ½ cup soy sauce, divided
• ✓ ¼ cup white sugar, divided
• + 4 teaspoons sesame oil, divided add to pantry
• + 2 cloves garlic, chopped, divided add to pantry
• + 1 teaspoon ground black pepper, divided add to pantry
• + 1 ½ pounds beef, thinly sliced add to pantry
• + ½ teaspoon sesame seeds add to pantry
• + 1 green onion, cut into 1-inch pieces, or more to taste add to pantry