Preheat oven to 350 degrees
Line a 12 cup standard muffin tin with paper liners or coat with nonstick spray, set aside
In a large mixing bowl mix the butter and granulated sugar until light and fluffy
Add egg, vanilla extract and yogurt, beat until well combined
Sift in the flour, baking powder and pinch of salt, beat on low speed until just mixed
Gently fold in about half of the strawberries
Fill muffin liners ¾ full with batter, top with remaining strawberries and then sprinkle streusel crumble on the top
Bake for 20-25 minutes, until the muffins are lightly browned on top and a toothpick inserted in the center comes out clean.
Enjoy!