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Preheat the oven to 350 degrees.
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Peel the potatoes using a vegetable peeler and then cut into 1-inch chunks. Add them to a large pot or Dutch oven and cover with about 10 cups of water, or until they are completely immersed. Bring the pot of water to a boil.
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Once boiling, reduce the heat to Medium-low and keep a rapid simmer for 10-12 minutes, or until the potatoes are fork tender. Drain the potatoes in a colander in the sink.
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Add the cooked potatoes to a large 11-14 cup food processor along with the other sweet potato base ingredients. Process for 20-30 seconds, or until the potatoes are smooth and there are no lumps remaining.
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In a medium-sized bowl, add all of the pecan topping ingredients except for the pecans. Mash it together with a fork until everything is well combined and a coarse crumb forms. Add the pecans and continue mixing until combined.
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Spray a 7x10-inch baking dish with non-stick cooking spray. Add in the potatoes and spread them out with a spatula until flat. Sprinkle the pecan topping all over the sweet potatoes.
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Bake in the preheated oven for 40-45 minutes, or until the topping becomes firm and begins to brown slightly.
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Let it cool for 10 minutes before serving. Enjoy!