Cut 8 ounces bacon into ½-inch pieces then add to a stainless steel skillet and place over medium heat; cook, stirring frequently, until browned and crisp, 8–10 minutes. Using a slotted spoon, transfer bacon to a paper towel lined plate. Reserve 1 tablespoon drippings in skillet, discard the rest.
Add ⅓ cup breadcrumbs to drippings in skillet and cook, stirring constantly, until golden brown, 3–5 minutes; set aside.
Cut 1 head of lettuce in half, top to bottom. Place halves cut side down and cut in half again, top to bottom. At this point, you have 4 wedges. You can use these as-is and move on to topping and serving them, or you can further cut them so they hold onto the dressing and toppings better.
To do this you’ll make 4 cuts on the wedge to form a cross, each cut should be 1 to 1 ½ inches in length and none of the cuts should reach each other—if they do, the wedge will fall apart. Arrange the wedge so the 90-degree corner is facing up with the core closest to you. Cut a 1-inch slice through the wedge along the bottom half of the corner edge. Rotate the wedge 90-degrees so the wedge is now running horizontally, make another cut through the wedge from the corner out to the edges, rotate another 90-degrees and make another cut along the bottom, rotate a final 90-degrees and a make one last cut from the center to the edges.
Arrange wedges on a platter and lightly sprinkle with salt. Spoon dressing over top, making sure it gets into the nooks and crannies. Sprinkle ½ cup diced tomatoes over top followed by 2 ounces crumbled blue cheese, cooked bacon, 2 tablespoons sliced chives, and breadcrumbs (in that order).