PAN ROAST THE PEARS
Toss the pears with 2 teaspoons of the sugar and a pinch of salt in a medium bowl
Heat a medium (12 inch) non-stick skillet, melt the butter and place the pears in the pan, cut side down in a single layer on medium-high heat
Cook pears until the sides are golden, about 2-4 minutes per side, carefully turning with a small spatula to caramelize the other cut sides, another 2-4 minutes each.
Turn heat off and with the skillet still sitting on the burner, add 2 tablespoons of the vinegar, gently coating the pears with the glaze
Remove the pears carefully from the pan and transfer to a plate or dish to cool for 30 minutes before plating
Make the vinaigrette In a medium bowl, whisk together 2 tablespoons of olive oil, the remaining 2 tablespoons of vinegar, the honey, and chopped leek. Season with salt and pepper. Tear the lettuce radicchio and parsley into pieces and add to the medium bowl with the vinaigrette, and toss gently. Divide the lettuce mixture between 4 individual serving plates, and top each portion with 2-3 pieces of the pan roasted pear, the candied walnuts, and the goat cheese. Drizzle with any remaining sauce from the bowl. Serve immediately.
MAKE THE CANDIED NUTS
Melt the butter In a large non-stick skillet on medium-high heat. Add the sugar and nuts, gently combining everything together using a non-stick spatula. Continue cooking, stirring frequently and adjusting the heat lower if necessary to avoid burning. As the sugar/butter mixture turns dark and syrupy, continue tossing the mixture gently in the pan to coat all the nuts. The process takes about 5 minutes.
Transfer the nuts to a piece of parchment paper or non-stick wax paper and let them cool until ready to use