Step 1

Core the lettuces and remove the leaves. Rinse and dry well. Tear any very large leaves into smaller pieces and arrange decoratively on a large platter.

Step 2

Cut the apple into matchstick slices and toss with fresh lemon juice to prevent them from browning. Scatter on top of the radicchio and endive on the platter.

Step 3

Cut away the rind and pith from the orange and cut into round slices, Cut each slice in half and scatter over the salad, along with the toasted walnuts and Gorgonzola. Sprinkle the salad lightly with sea salt and freshly ground black pepper.

Step 4

Place the shallot, Dijon mustard, mayonnaise, maple syrup, apple cider vinegar, and oil in a jar. Seal with the lid and shake vigorously until fully incorporated. Season with salt and pepper, to taste.

Step 5

Drizzle the dressing evenly over the salad and serve immediately.