Whisk together dry ingredients in a large bowl. In a medium bowl whisk together eggs, milk, and vanilla.
Stir wet ingredients into dry ingredients to form the batter. Try not to over-mix, but stir out any large lumps. If the batter is super-thick (not pourable) add another 1/4-1/2 cup milk. Stir in melted (and cooled) butter.
Pour batter into heated waffle iron in 1/3 cup batches. Before closing the waffle iron, dot the waffle with fresh sliced strawberries. Cook waffles according to waffle iron instructions.
For Nutella Whipped Cream:
Add Nutella and cold heavy cream to a bowl. Whip rapidly with a whisk (or you can use a hand mixer) until mixture is light and fluffy and holds its shape. Keep chilled until you need it.
Serve waffles with big spoons of Nutella cream and fresh strawberries on top.