Step 1

In a small bowl, whisk together the lemon juice, vinegar, mustard, salt, and pepper. Still whisking constantly, slowly drizzle in both oils and continue to whisk until the dressing is completely emulsified. (Alternatively, place all the vinaigrette ingredients in a small jar, screw on the lid, and shake until completely emulsified.)

Step 2

In a large bowl, gently toss the lettuce, parsley, dill, radishes, shallot, chives, and walnuts.

Step 3

Drizzle the salad greens with the walnut vinaigrette and gently toss again. Season with salt and pepper and toss one last time, making sure each leaf is coated with the vinaigrette. Taste and add more vinaigrette or salt and pepper, if needed. (If you have leftover vinaigrette, you can refrigerate it in a lidded jar for up to several days.)

Step 4

Transfer the salad to a large platter or serving bowl. Using a vegetable peeler, shave strips of ricotta salata over the top. Finish, if desired, with a drizzle of walnut oil. Serve immediately.