Don't Ever Suffer Through Mushy Zucchini Fries Again With One Helpful Tip - Tasting Table
Briefly

Zucchini fries can offer a healthy alternative to traditional fries. However, using previously frozen zucchini can result in a soggy and unappetizing outcome due to the high water content of zucchini. The freezing process disrupts the vegetable's structure, leading to moisture retention that inhibits crispiness. Instead, fresh zucchini should be used, starting with salting to draw out moisture. To prepare crispy zucchini fries, a cornstarch dusting before cooking is recommended to enhance texture and achieve the desired crunch.
At around 94% water, zucchini has no chance of staying firm after thawing, making frozen zucchini unsuitable for achieving that desired crispiness.
If you're looking for something to do with that surplus squash you froze during summer, fries are not the answer; treat yourself to fresh produce.
A crispy exterior relies on removing as much moisture as you can, initiated by salting your zucchini after cutting to draw moisture out.
Using a dusting of cornstarch before cooking will help zucchini fries crisp up, as they need additional assistance to achieve the desired texture.
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