In a skillet over medium heat, start melting the 1/4 cup sugar. Once the sugar has melted, add the nuts quickly and stir to coat them. Carefully transfer nuts onto waxed paper. Allow to cool, and break into pieces.
For the dressing: blend oil, vinegar, 1 1/2 teaspoons sugar, mustard, chopped garlic, salt, and pepper.
In a large serving bowl, layer lettuce, pears, blue cheese, avocado, and green onions. Right before serving, pour dressing over salad, and sprinkle with pecans.