Preheat oven to 375 degrees F. In a small bowl, combine pears, orange juice, cranberries, the 4 teaspoons finely chopped crystallized ginger, the cinnamon, and vanilla. Spoon mixture into an ungreased 1-quart casserole.
In another small bowl, stir together oats, brown sugar, and flour. Stir in melted butter. Sprinkle oat mixture and almonds over pear mixture in baking dishe.
Bake for 20 to 25 minutes or until pears are tender and almonds are golden brown. Serve warm. If desired, top with yogurt and additional crystallized ginger.