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Export 8 ingredients for grocery delivery
Preheat oven to 350˚F
Dump the potatoes into a large mixing bowl with peppers and onion.
Add all the cheese sauce ingredients to a blender and process until completely smooth.
Pour the cheese sauce over the potatoes, peppers, and onions. Use a large spoon or rubber spatula and stir until everything is mixed and well combined.
Add the mixture to a 9×13 nonstick baking dish or line one with parchment paper. Place in the oven and bake, uncovered, for 50 mins. to 1 hour.