If you love BLT sandwiches, then you'll really love this pasta version. To make this truly unique, we created a blue cheese-buttermilk dressing that you can modify to your tastes depending on the type of blue cheese you pick — fruity, creamy, spicy, or salty.
Bring a large pot of salted water to a boil over high heat. Cook the penne according to the package directions. Drain, rinse under cold water, and place in a large bowl. Set aside.
Place the blue cheese, sour cream, buttermilk, and vinegar in a bowl. Use a fork to break up the blue cheese and combine the ingredients to make the dressing. Season with salt and pepper, to taste.
Place the penne, romaine lettuce, tomato, radishes, and bacon in a large bowl. Stir in the dressing. Top each serving with a half slice of mozzarella.