Step 1In a bowl, whisk together the mustard and egg yolk. Whisk in the vinegar, then the olive oil in a slow drizzle. Taste, seasoning with salt and pepper and adjusting the flavorings if desired. This makes a scant one-half cup dressing. The dressing will keep, covered and chilled, up to 3 days.
Step 1In a large bowl, toss the lettuces with the cheddar, pepperoni, cucumber, olives, raisins and pistachios. Toss with 4 tablespoons vinaigrette, then continue to add a little more until the salad is coated to taste; you may not use all the vinaigrette. Transfer to a chilled plate and garnish with basil and cracked pepper.