To make candied almonds, pour 1/2 cup sugar in a dry saucepan. Heat over medium heat until sugar caramelizes, stirring often. Add almonds and stir to coat. Spread candied almonds onto a silicone baking mat or waxed paper to harden.
Place lettuce in a large bowl, and set aside.
In a blender, combine vinegar, 2 tablespoons sugar, parsley, salt, and pepper. Turn blender on low and stream in olive oil slowly. When all combined, toss lettuce with dressing. Top with candied almonds and mandarin oranges, and serve.