Add 2 tablespoons butter to a large skillet on medium heat. Once melted, add mushrooms and asparagus. Cook until lightly browned (about 4 minutes). Season with salt and pepper to taste. Remove from skillet and set aside. Wipe skillet.
Add remaining butter and turn heat to medium. Once melted, add thawed cauliflower and cook 3 minutes. Add cooked mushrooms and asparagus.
Whisk together French Onion Dip, broth and cream. Pour into skillet and cook over medium heat until most liquid has evaporated (about 5-7 minutes).