Step 1

In a medium skillet over medium heat, heat the oil until it shimmers. Add the bread and sprinkle in the seasoning salt. Stir or shake the pan until the bread cubes are lightly coated in oil, adding more oil if needed. Cook, stirring occasionally, until the bread is crisp and golden brown, about 5 minutes. Remove from the heat.

Step 2

In a large serving bowl, combine the celery, radishes, cucumbers, romaine and onion. Toss to combine, then season with a small pinch of salt and a few grinds of pepper.

Step 3

Add the sardines, along with their oil, breaking them into bite-size pieces as you toss them with the vegetables. Add the dill and parsley, and gently toss to combine.

Step 4

Finely grate the zest of the lemon into the bowl, then halve the lemon and add all of its juice to the salad. Taste, and adjust the salt and pepper to your liking. Add the croutons and toss well before serving, family-style.