Adjust oven rack to the middle position; preheat oven to 425°.
Pulse the bread, butter, and 1/2 cup cheese in a food processor until coarsely ground.
Cook the bacon in a Dutch oven over medium heat until crisp, about 8 minutes.
Transfer the bacon to a paper towel-lined plate and pour off all but 1 tablespoon of fat.
Cook the onion until softened, about 5 minutes.
Add in the garlic and cayenne; cook until fragrant, about 30 seconds.
Stir in the sweet potatoes, cream, buttermilk, and salt; decrease heat to med-low and cook, covered, until the potatoes are just tender, about 30 minutes.
Off the heat, stir in the remaining 2 cups cheese, cooked bacon, and 4 of the scallions.
Transfer the mixture to a 13 x 9 inch baking dish; top with the bread crumb mixture.
Bake until the crumbs are golden brown, about 15 minutes.
Cool 10 minutes, then sprinkle with the remaining scallion.
Serve.

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Nutrition Facts

Per Serving Per 100 g

Amount Per 1 Serving
Calories	510.11 Kcal (2136 kJ)
Calories from fat	219.97 Kcal
		% Daily Value*
Total Fat	24.44g	38%
Cholesterol	65.41mg	22%
Sodium	1143.68mg	48%
Potassium	884.24mg	19%
Total Carbs	57.51g	19%
Sugars	11g	44%
Dietary Fiber	7.3g	29%
Protein	16.85g	34%
Vitamin C	7.3mg	12%
Vitamin A	2.9mg	96%
Iron	2.8mg	15%
Calcium	323.9mg	32%

Amount Per 100 g
Calories	139.48 Kcal (584 kJ)
Calories from fat	60.15 Kcal
		% Daily Value*
Total Fat	6.68g	38%
Cholesterol	17.88mg	22%
Sodium	312.71mg	48%
Potassium	241.78mg	19%
Total Carbs	15.72g	19%
Sugars	3.01g	44%
Dietary Fiber	1.99g	29%
Protein	4.61g	34%
Vitamin C	2mg	12%
Vitamin A	0.8mg	96%
Iron	0.8mg	15%
Calcium	88.6mg	32%

* Percent Daily Values are based on a 2000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.
Find out how many calories should you eat.

Tastes

salty
savory
bitter
sweet

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