Preheat oven to 400.
Place bread cubes in a single layer on a jelly-roll pan. Lightly coat bread cubes with cooking spray. Bake at 400 for 10 minutes or until golden, stirring once.
Combine vinegar and next 7 ingredients (through red pepper) in a large bowl, stirring with a whisk. Add toasted bread cubes, lettuce, and tomato; toss gently to coat. Sprinkle with onions and bacon. Serve immediately.
Core (Plus points for bread & bacon + 1 oil)