Pre-heat oven to 200C. Combine flour and sugar in a large bowl. Combine milk, oil and eggs in a separate bowl, whisk lightly then stir in strawberries and chocolate buttons. Make a well in the centre of the flour mixture, pour in the milk mixture and mix lightly. Spoon batter into six greased muffin tins (½-cup capacity) until three-quarters full. Sprinkle pepitas over muffins and bake for 25-35 minutes or until golden and cooked. Turn onto a wire rack to cool.