Created by MistyNix on January 24, 2015
Step 1: Butter a 2-quart baking dish.
Step 2: Put the sweet potatoes on a sheet tray and roast for 35 to 40 minutes. The sweet potatoes might still be a little hard in the center but that's okay.
Step 3: Preheat your oven to 375 degrees F.
Step 4: While the sweet potatoes are baking make the topping. In a food processor, combine the oatmeal, brown sugar, olive oil, butter, and walnuts and pulse until mixture comes together.
Step 5: When the potatoes are cool enough to handle, peel them and cut them into 1-inch chunks. Discard the skins. Put the potatoes into a large dish and add the remaining ingredients. Mash together with a potato masher until well combined.
Step 6: Transfer the mixture to buttered casserole dish.
Step 7: Crumble the topping mixture over the potatoes. Bake until the mixture hot all the way through and the topping is brown and crispy, about 30 minutes.