This savory quiche combines diced Canadian bacon, fresh asparagus, and shredded hash brown potatoes under a layer of melted Havarti cheese. A simple egg and milk custard binds the hearty filling together inside a crisp pastry shell. The addition of dried marjoram brings a subtle earthy note to the rich ingredients. Serve this warm tart for a relaxed weekend brunch or a comforting weeknight dinner alongside a crisp green salad.