Mild and sweet Vidalias have a short season and limited supply that can make them scarce and pricey. Substitute other large sweet onions, such as Oso Sweets from Texas, Walla Walla or Maui onions.
You can retain the silky smooth texture of these classic tartlets and stretch your grocery budget by substituting 1 cup whole milk for the half-and-half cream specified in the recipe.
