How to Make It
Preheat oven to 400°F. Toss bread with 1 tablespoon oil on a rimmed baking sheet. Toast in a single layer until golden brown, 10 to 15 minutes. Let cool.
Meanwhile, cook bacon in a large skillet over medium, turning often, until crisp, 5 to 7 minutes. Drain on a paper towel–lined plate. Break into pieces.
Whisk vinegar, mustard, honey, and pepper in a large bowl. Gradually add remaining 3 tablespoons oil, whisking constantly until smooth.
Add bacon, toasted bread, arugula, tomatoes, basil, avocados, and capers and toss to coat.