Sweet potato croquettes

1 tablespoon butter
1 teaspoon salt
1/4 teaspoon black pepper
1 teaspoon cinnamon
1/2 teaspoon nutmeg

2 cups Japanese panko breadcrumbs
2-3 cups canola oil for frying

Combine all ingredients except those for coating.
Chill sweet potato mixture for at least 2 hours.
Remove from fridge and roll into 1″ balls.
Dredge sweet potato balls in panko.

Dredge sweet potato balls in panko again for a nice crust.
Heat oil and when hot, add sweet potato balls to fry.