Salad dressing

By rocket salad, we are talking arugula only for greens , yes? If so, i second the olive oil, lemon, salt only - maybe may add a bit of shaved parmesan.

Allan, search here (the magnifying glass) using "arugula" in recipes, to find hundreds of dishes, many of them salads, for more ideas...dressing and other ingredients.

https://food52.com/recipes/16940-april-bloomfield-s-lemon-caper-dressing

Here's a bit less simple but still usper easy: Orange, lemon & grapefruit juice + Honey + Olive Oil + fleur de sel & fresh ground black pepper

Or GOOD Balsamic + Good Olive Oil + fleur de sel & fresh ground black pepper
Its all about the quality of the ingredients on that- also can add some crumbled gorgonzola

Lemon juice, olive oil, and a little fleur de sel. :)) simple.