Preheat oven to 375 degrees. Slice baguette in fairly thin slices at an angle. Arrange bread slices on a large sheet pan and lightly drizzle with olive oil and a sprinkling of sea salt. Put in the oven to toast for 7-10 minutes or to your liking. Remove from oven.
Meanwhile, slice figs 1/4" thick. Hand tear basil. Cut prosciutto.
If you are serving it immediately, go ahead and spread the goat cheese, basil, prosciutto, and a slice or two of fig. Arrange on a serving plate and lightly drizzle with olive oil and balsamic vinegar. If you are taking it to go, allow the bread to cool before assembling the crostini. Wait to drizzle it with oil and vinegar until serving.