The Kitchn: This no-wilt Italian chopped salad is the make-ahead lunch you need
1 teaspoon Dijon mustard
3/4 teaspoon kosher salt
1/4 teaspoon red pepper flakes
Freshly ground black pepper
1/4 cup extra-virgin olive oil
For the salad:
5 ounces cherry tomatoes
2 large or 4 small stalks celery
1/2 small red onion
6 small pickled pepperoncini
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