a separate bowl. add salt and pepper and pour over the onions.
bake for 30-40 minutes, until lightly golden on the top and firm to the touch. remove from oven, cool 15 minutes, and slice.
this tart is elegant and flavorful. i let it cool completely before i top it with sour cream and serve it with steaming clam chowder. i just think that the combination goes good together. 