Caramelized Onion-Tomato Jam Crostini with Brie are delicious hand-held appetizers sure to be popular at any holiday gathering. The appetizer recipe which features rich buttery homemade onion- tomato jam is also meatless, adding to it's wide appeal among guests. In addition to being a great party appetizer, savory Caramelized Onion-Tomato Crostini with Brie are a