01 - Preheat oven to 350°F (175°C) and position rack in center.
02 - In a large mixing bowl, combine sliced pears, granulated sugar, cinnamon, and nutmeg. Toss gently to coat.
03 - Transfer pear mixture evenly into an ungreased 8x8-inch baking dish.
04 - In a separate bowl, whisk together oats, flour, brown sugar, cinnamon, and salt. Add chilled butter cubes, and blend with fingertips until crumbly.
05 - Sprinkle oat mixture evenly over pears, pressing lightly to adhere.
06 - Bake in the preheated oven for 35-40 minutes, or until pears are tender and topping is golden-brown.
07 - Allow dish to cool for 10 minutes, then portion and serve while warm.