Start by making your waffles. Whisk together the melted butter, milk, vanilla, and eggs until combined.
And the sugar, baking powder and flour. Whisk again until the batter is smooth and homogeneous. Cook your waffles using a waffle iron according to the waffle iron directions.
Prepare your gravy by cooking the sausage in a large pan or skillet over medium heat. Once the sausage is fully cooked, whisk in the flour until it evenly coats the sausage.
Add the milk, salt, and pepper. Slowly stir the gravy for about 5 minutes over medium heat, or until it starts to thicken.