This is my Mom's favorite .

8 strips bacon
1/2 baguette (sliced into 3/4-inch cubes) (about 4 cups)
2 tablespoons olive oil
coarse salt and ground pepper (to taste)
1/3 cup buttermilk
3 tablespoons mayonnaise
2 tablespoons cider vinegar
1 scallion (thinly sliced)
1 pound romaine-lettuce hearts (chopped)
1 pint cherry tomatoes, halved

Preheat oven to 375°. Arrange bacon in a single layer on a rimmed baking sheet lined with parchment or waxed paper. Bake until browned and crisp, about 15 minutes. Transfer to a paper-towel-lined plate to drain.Cool, then crumble into large pieces.
Make croutons: Toss bread with oil, and season with salt and pepper. Spread evenly on a baking sheet. Bake until golden brown, tossing halfway through, 15 to 20 minutes.
In a large bowl, whisk together buttermilk, mayonnaise, vinegar, and scallion; season with salt and pepper. Add lettuce, tomatoes, and croutons; toss to coat with dressing. Sprinkle with bacon.

Sounds great!