Preheat oven to 400 degrees. To make sourdough croutons, slice bread into 1-inch cubes and toss with 2 tablespoons of olive oil. Place bread cubes on a rimmed baking sheet and bake until lightly toasted, about 10 minutes.
Meanwhile, fry bacon over medium heat for 10-15 minutes, turning frequently until cooked through. Place cooked bacon on a paper towel lined plate to drain. Once cool, chop or crumble bacon into bite-sized pieces.
In a large bowl, combine spring salad mix, bacon pieces, grape tomatoes and sourdough croutons. Toss with desired amount of Blue Cheese Dressing. Enjoy!