Korean Sweet Potato Noodles (Japchae)

Ingredients (13)

• + ¼ cup soy sauce add to pantry
• + 4 teaspoons mirin (Japanese sweet wine) add to pantry
• + 1 tablespoon sesame oil add to pantry
• ✓ 2 cloves garlic, minced
• + 1 teaspoon ground black pepper add to pantry
• + 1 pound flank steak, sliced across the grain add to pantry
• + 2 tablespoons honey add to pantry
• + 8 ounces Korean sweet potato noodles (dangmyun) add to pantry
• ✓ 1 egg
• + 2 cups baby spinach, or more to taste add to pantry
• + 1 teaspoon light olive oil add to pantry
• + 1 large carrot, cut into matchsticks add to pantry
• ✓ ½ onion, sliced