Preheat oven to 400ºF. Line a sheet pan with foil. Add bacon to the pan in a single layer. Season bacon with 2-3 tablespoons of Nashville Hot Seasoning, depending on your preference. Cook bacon in oven for about 10-15 minutes, again, depending on your preference of crispiness. Transfer bacon to a paper towel lined plate to drain.

Slice ciabatta loaf in half lengthwise. Drizzle lightly with oil and toast in oven if desired.

Meanwhile, in a bowl whisk together mayo, buttermilk, and Ranch Seasoning. Reserve ⅓ cup dressing. Add chopped lettuce to the remaining dressing in the bowl and toss to combine.

Spread the remaining ⅓ cup prepared ranch dressing on the halved ciabatta. Top with bacon, tomato slices, and dressed lettuce.

Slice the assembled loaf into 4 equal parts to serve.