Preheat oven to 400° Fahrenheit and line a large baking sheet with parchment paper.
Arrange the baguette slices on the baking sheet and brush both sides of each slice with olive oil.
Bake for 10 minutes, or until golden brown and toasted. Remove from oven and let cool while you make the whipped feta.
Add the feta, yogurt, olive oil, and salt to a large bowl. Use either a hand or stand mixer to whip the feta until mostly smooth and combined (some lumps of feta may remain).
Top each crostini with about a tablespoon of whipped feta, then top however you’d like. I recommend either pomegranate and honey, sliced pears, walnuts, and honey, or olive oil and flaky salt.