01 - Preheat the waffle iron according to the manufacturer's instructions.
02 - Whisk together the all-purpose flour, granulated sugar, baking powder, and salt in a large mixing bowl.
03 - In a separate bowl, whisk the eggs, milk, melted unsalted butter, and vanilla extract until smooth and fully combined.
04 - Pour the whisked wet ingredients into the bowl with the dry mixture and mix gently until just combined. Some lumps are acceptable; do not overmix.
05 - Gently incorporate the diced strawberries into the waffle batter using a spatula.
06 - Lightly grease the hot waffle iron with melted butter. Pour in an appropriate amount of batter as recommended for your specific waffle iron model.
07 - Close the waffle iron and cook until the waffles are golden brown and crisp, about 3 to 5 minutes per batch.
08 - Transfer waffles to plates and serve warm with whipped cream or yogurt, additional strawberries, and maple syrup or honey as desired.