In a large bowl, whisk together the seasoning packet from the instant ramen with the kewpie mayo, garlic, and egg until it comes together in a thick sauce.
Cook the instant ramen in 2 cups of water according to the cook time on the package.
Carefully pour the hot noodle water into the sauce, whisking as you go so it emulsifiers into a smooth, thick broth.
Add the noodles to the soup, top with scallions and toasted sesame seeds and enjoy hot!
