You will need:
1 package ramen
I like 'Chand' ramen which tends to be high in garlic and with rice noodles. Kimchi ramen, and almost anything else almost works save for udon type noodles since they can get under cooked or over cooked.
Meat / meaty things:
Left over stirfry
Egg pancake strips (one egg, stirred as if to scramble, poured in a hot pan, flipped when done on one side, cool, roll, slice)
Diced tofu - can be frozen as a solid block, thawed in microwave (this will change the texture)
Vietnamese meatballs / pate (cha mo or gio lua?) - this freezes very nicely. Meatballs expand in a most amusing manner if placed on top of the soup.
Chazuke sprinkles (good on plain rice with broth / tea, and the toppings listed here)
Frozen Green beans
Cilantro (add at end) (can be frozen, but add before it is thawed, since it gets very sad and limp)
Canned Baby corn
Plop your toppings and about half of the noodles in a large bowl. Add seasonings. Top with water or broth. Microwave until the noodles are done. Top with cilantro. Serve.
If you don't have a large enough bowl, you can leave out cooked meat and tofu to add to the soup as you eat it, or you can also prepare it in a pot on the stove (I'd suggest boiling the noodles first, then adding the toppings to avoid beating up the tofu.) Using all the noodles, one packet of ramen can stretch to feed three. Note that only a small amount of each product goes into the soup.
Since a lot of this can be frozen, you can literally make this in about 10 minutes from pantry ingredients.