Swap Croutons With One Soy-Based Ingredient On Your Next Salad - Tasting Table
Briefly

Soy nuts are a protein-packed alternative to croutons that are guaranteed to be your new favorite salad topping.
They are full of vitamins and may help reduce the risk of heart disease - and yet, they're just as delicious and satisfying as a crouton.
If you go for the simple dry-roasted and salted soy nuts, you won't have a hard time pairing them with salad, since their flavor is fairly neutral.
This (making your own) is a bit more time-consuming, but it will allow you to play around with flavor to better fit in with the other ingredients in your salad.
Read at Tasting Table
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