Preheat the oven to 375°F (190°C) and line a muffin tin with paper liners.
In a bowl, mix the flour, sugar, baking powder, and salt.
In another bowl, whisk together the oil, egg, vanilla extract, and milk.
Combine the wet and dry ingredients until just mixed.
Gently fold in the chopped strawberries.
Divide the batter evenly among the muffin cups.
Sprinkle sugar on top of each muffin for a sweet crust.
Bake for 20-25 minutes or until a toothpick comes out clean.
Allow muffins to cool in the pan for 5 minutes before transferring to a wire rack.
Enjoy your delicious strawberry muffins warm or at room temperature!