If you want a homemade Caesar dressing, here's my recipe. Otherwise, use your favorite bottled variety.
Preheat oven to 350F. Cut the bacon into small pieces (I find this easiest using kitchen shears). Fry it in a skillet until crispy.
Meanwhile, you can prep your other ingredients. Cut the baguette into even-thickness slices and brush both sides with the olive oil. You may need to add more oil if you run out, but 1/4 cup is a good start without wasting any.
Bake the crostini for 10-15 minutes or until they're as crispy as you want. 15 minutes made them really crispy (like croutons). You can flip them halfway through if you want even color.
Take the crostini out of the oven and let them cool for a couple of minutes. Top them with the lettuce, chicken, Caesar dressing, bacon, parmesan, and salt & pepper. Serve immediately.
Notes
You can do a lot of the prep while the bacon cooks/the bread is crisping up in the oven, so I indicated prep time as a bit less than I would otherwise. Recipe will take longer if you make the Caesar dressing from scratch.
The recipe easily doubles, and the quantities I recommend are merely suggestions. Feel free to add more/less chicken or any other ingredient to suit your individual tastes.