Combine mustard, balsamic vinegar, soy sauce, honey, salt and pepper in a mixing bowl. Drizzle in olive oil and vegetable oil, whisking to an emulsion. Set aside. Cut papaya and guava into thin slices. Julienne the Asian pear. Put mesclun in a large bowl. Toss with dressing. Mound on a platter. Place fruit slices on top. Sprinkle with Asian pear. And chunks of goat cheese.