Why does broccoli go soggy in hot water?

Broccoli goes soggy in hot water due to the breakdown of its cell structure when exposed to high temperatures. The heat causes the cell walls to soften and lose their rigidity, leading to a mushy texture. Additionally, prolonged cooking can cause the loss of water-soluble nutrients and flavor compounds, further diminishing the quality of the vegetable. To maintain its crispness, it's best to blanch broccoli briefly or steam it rather than boiling it for long periods.