Preheat the oven to 325. Butter a shallow 10 by 15 inch jelly roll pan.
Beat the egg white until stiff. Mix the cinnamon and salt into the sugar. Keeping the beater running, add the sugar mixture, 1 tablespoon at a time.
Fold in the melted butter and the pecans.
Spread the pecan mixture in the prepared pan and bake for 15 minutes.
Remove the pan from the oven. Using a spatula, carefully flip the pecan mixture one small section at a time. When all the pecans have been turned over, return the pan to the oven for an additional 15 minutes. Watch them carefully-do not allow them to burn.
Cool the pecans on paper towels.
(Only one cup of pecans is used in the preparation of the salad. The other cup can be eaten as a snack or frozen in a zippered plastic bag. These pecans also make a wonderful holiday gift).
Whisk together the mustard, sugar and vinegar. Whisking constantly, dribble in the olive oil. Add salt and pepper to taste.
Wash, dry and trim the arugala and other greens. Tear them into large bite size pieces. Just before serving, toss with the vinaigrette. Sprinkle 1 cup of the pecans over the top and toss again. Serve immediately.