Heat a pan to low heat and add 1 tablespoon olive oil. Thinly slice the onion and add to the pan. Cover and stir every couple minutes. Let them caramelize for about 30-35 minutes.
Turn the oven on broil and let it pre-heat. In the meantime slice the baguette into about 1 ½ inch slices. Place the slices on a sheet pan and lightly drizzle with olive oil.
Broil for about 3 minutes. Every oven is a bit different so it might take a little longer. Be sure to keep an eye on the bread, though, because it can burn quickly with the broiler. You want it to be just slightly toasted.
When the bread is toasted and the onions are caramelized, it is time to start building the crostini. Spread the goat cheese on the bread first, then the fig spread, then a small piece of prosciutto, and finally top with some onions.
Serve right away, or cover with foil and set out later for your guests! Enjoy!
Notes
Use any bread that you like best, whether it is gluten-free or not. You can even use crackers if you are trying to make them even more bite-sized.
I like goat cheese best, but you can also use any of your favorite spreadable cheese, like Kite Hill cream cheese.
These are great to make ahead of time (but not the night before).