Heat your oven to 350 degrees F. Rinse and peel your pears. Remove the stems. Slice the pears (avoiding the core) into pieces about 1/3-inch thick. Place your pears in an ungreased pie dish and toss them with the cinnamon.
Give your pecans a rough chop, so they're still chunky. In a small mixing bowl, combine your pecans and all topping ingredients with a spoon or fork.
Cover your pears with your topping, spreading it evenly. Bake for 35-40 minutes, or until the fruit is bubbling, and the topping is crisp and golden. Let the pear crisp cool for 10 minutes before serving. Store leftovers covered at room temperature for up to a week, but they'll probably be gone quickly.
This is so good plain, but if you don't need it to be vegan or lower in calories, you can add whipped cream or vanilla ice cream.