Drizzle the sweet potatoes with a small amount of oil, or use oil spray, and bake in the oven in a casserole dish for 30 minutes or until fork tender.
While the sweet potatoes are cooking, Mix together ¼ cup of brown sugar, cinnamon, nutmeg, allspice, and salt in a small bowl.
Once the sweet potatoes are baked, add the apples to the casserole dish and sprinkle with the brown sugar spice mix until evenly distributed.
In a separate larger bowl, mix the topping ingredients together by combining the pecans, flour, butter, and the other ¼ cup of brown sugar. It helps to use your hand to rub the ingredients together between your fingers, as the butter may stay clumped up and not mix well with just a spoon.
Sprinkle the pecan topping over the top of the casserole.
Return it to the oven for 30 minutes until the topping is golden-brown and has a nice crunch.
Notes
You can prep the sweet potatoes and apples a day ahead and store them separately in the fridge.
If the topping starts to brown too quickly, cover loosely with aluminum foil.
For a sweeter version, add 1/4 cup more brown sugar to the filling.
Store leftovers in an airtight container in the fridge for up to 4 days.
This recipe was calculated using the exact brands and measurements I used to make this recipe. If you are following a strict diet please note changing anything will cause the nutritional info to change. My calculations are intended as a guide only.