Why this matters
Starch absorbs water, swells, and can move into the surrounding liquid. That behavior creates creamy risotto, glossy pasta sauce, or unwanted gumminess depending on the method. Variety, processing, pan shape, and lid fit matter, which is why package directions are a sensible first reference. Record a successful ratio for the exact grain and pan you use.
How to do it
Cook noodles in the soup only for the time they need, adding them near the end. For leftovers, cook and store noodles separately so they do not keep absorbing broth.
What to look, hear, or feel for
Noodles should be tender with a little structure, and the soup should retain enough liquid to feel like soup.
When something goes wrong
If noodles swell and thicken leftovers, add unsalted stock or water when reheating. For the next batch, portion noodles into each bowl separately.
Try it in a real meal
Use this lesson for weeknight pasta, rice bowls, grain salads, soup noodles, and safe leftover reheating.