Toss the tooth-breaking croutons for breadcrumbs, and don't look back. Serious Eats / Amanda Suarez Salads follow food trend cycles like nearly every other food category. Do you remember that there was a time before Americans regularly ate kale salads? Now they're everywhere. Today, if I were to make a spreadsheet of the best restaurant salads (yes, I have been known to make this sort of spreadsheet), many would have an ingredient more typically associated with fried foods and casseroles: breadcrumbs. And this is a trend I'm definitely on board with. My all-time favorite salad is a Caesar salad , yet I can't even recall the last time I saw a crouton on a Caesar at a New York City restaurant. Where have all the croutons gone? Apparently, they've gone into the food processor and come out as delightfully crunchy breadcrumbs.…