Creamy summer slaw

This is a refreshing, crispy side dish to whip up for a BBQ.  My friend is making pulled pork sandwiches this afternoon and it will be the perfect accompaniment!

2/3 cup buttermilk
1/3 cup mayonnaise
Juice of 3 lemons
Salt and pepper
1 small bunch broccoli
4 cups pre-packaged sliced cabbage and carrot mixture (or you can make your own)
8 ounces sugar snap peas, thinly sliced
4 tablespoons chopped fresh chives

Combine buttermilk, mayonnaise, and lemon juice in a small bowl; season with salt and pepper and whisk to combine. Set buttermilk dressing aside.
Cut off the stalk of the broccoli and halve broccoli lengthwise the head of broccoli lengthwise, then thinly slice crosswise, starting at crown. Toss broccoli, cabbage, carrots, sugar snap peas, chives, and buttermilk dressing in a large bowl; season with salt and pepper.