In a medium bowl, whisk together mayo, sour cream, buttermilk, whole milk, honey, white wine vinegar and black pepper until smooth and creamy. Fold in the blue cheese and chopped figs. Cover and refrigerate until you are ready to serve.
Season steak generously with salt and black pepper. Preheat a large griddle pan over medium-high heat. Add 1 tablespoon of butter and melt. Once melted, add steak and cook for 3-4 minutes on each side (for medium rare). Remove from heat and set aside to rest. Once rested, slice the steak against the grain in long, thin strips. Set aside.
Assemble salads by layering sliced sirloin, cherry tomatoes, bacon, blue cheese and figs on 4 iceberg salad wedges. Drizzle with the warm honey fig blue cheese dressing and garnish with fresh parsley.