Cook 1 (16-ounce) box penne pasta according to package directions. Drain and rinse the cooked pasta in cold water.
In a large bowl, combine the pasta, 1 cup cooked and chopped bacon, 1½ cups halved grape tomatoes, ¼ cup chopped parsley, ½ cup thinly sliced green onions, 1 cup shredded sharp cheddar cheese, and ½ cup slivered almonds.
In a medium-sized bowl, whisk together 1 cup mayonnaise, ¼ cup buttermilk, 1 tablespoon Italian seasoning, ½ teaspoon garlic powder, ½ teaspoon onion powder, and salt and pepper to taste.
Pour the dressing over the pasta and mix until combined.
Notes
Leftover and Make Ahead Instructions
Refrigerator: Store in an airtight container for up to 3–4 days. For best results, reserve a little dressing and toss it in right before serving to freshen it up.
Freezer: Not recommended, as the texture will not hold up well after thawing.
Make-Ahead: You can prep the ingredients ahead of time, just wait to toss the salad with the dressing until right before serving.