This classic casserole straddles the line between side and dessert (indeed, we’ve enjoyed the leftovers both ways). We dial down the sugar to steer the dish back to savory territory, and add a crunchy oat and nut topper for texture. A final drizzle of maple syrup just before serving gives the casserole a lovely sheen. While we call for a ricer in our master mashed potatoes, a potato masher is perfectly acceptable here since the spuds will be bound with an egg then topped and baked. Chopped almonds or walnuts would be a delicious sub for the pecans.