Herb Pasta Salad

Ingredients
4 cups penne pasta, dry
1 1/4 cups feta cheese, crumbled
1/2 cup buttermilk
1/4 cup mayonnaise
2 Tablespoons Crystal Louisiana-style hot sauce
1 Tablespoon grated lemon zest plus 1/4 cup fresh lemon juice
1 1/2 teaspoons kosher salt
1 teaspoon grated garlic
1/2 teaspoon black pepper
4 cups mixed fresh herbs (basil, dill, and chives), torn
1 1/2 cups celery, thinly sliced
1 cup cherry tomatoes, halved
1/2 red onion, thinly sliced
3/4 cup roasted sunflower seed kernels

Instructions
Cook pasta according to package directions. Drain and rinse pasta under cold running water. While pasta cooks, stir together feta, buttermilk, mayonnaise, hot sauce, lemon zest, and juice, salt, garlic, and black pepper in a medium bowl. Transfer pasta to a large serving bowl. Add buttermilk dressing, torn herbs, celery, tomatoes, red onion, and sunflower seeds, and toss well.