Ingredients:

2 1/3 cups all-purpose flour

3 tsp baking powder

1/3 cup granulated sugar

1 tbsp vanilla sugar (optional)

pinch salt

1/2 cup Greek Yogurt

1/3 cup milk

1/3 cup sunflower oil (I use light olive oil)

about 2 lbs prune plums, pitted, quartered

2 cups all-purpose flour

1 cup granulated sugar

1 cup cold butter

Instructions:

Preheat oven to 350 F.

Into a large mixing bowl, mix 2 1/3 cups flour, baking powder, 1/3 cup sugar, vanilla sugar (if using) and salt.

Add yogurt, milk, and oil and using dough hook, mix for a minute or so until dough holds together (do not over-beat!) ... if you wish, you can just mix it in a bowl with a wooden spoon, and knead lightly with hands till it holds together.

Press dough into a 9x13 inch pan or divide dough into two if using 2 spring-form pans.

Place plum quarters in rows on top of dough.

Mix together the 2 cups flour, 1 cup sugar, and butter to make the streusel dough. Crumble over top of plums.

Bake at 350 F for about 50 - 60 minutes or until top is lightly browned.

Let cool and serve. 

Serves about 10