Red Currant Bakery

Fruit filling
0 Preheat the oven to 350 F and place a rack in the center of the oven.
2 Rinse the plums. Cut them in half down the crack and through the stem top. Twist the halves apart, then cut each half in half again to remove the pit. Cut each half in half again and then cut those slices into 3.
3 Add the plums along with the frozen berries and sugar into your baking dish. Mine is 5" x 5" and 2" deep but check the tips in the notes for a larger dish! The fruit should come to within 1/2" of the top edge of the dish.
4 Stir to combine and set aside while you make the streusel.
Streusel
6 In a medium bowl use a fork to stir together the soft butter, vanilla, sugar and salt. Pour in the flour and oats.
7 Using the fork again, rub the butter mixture into the dry ingredients until all of it has been fully mixed in.
Assemble & Bake
9 Clump the streusel and sprinkle it over the fruit.
10 Place the dish into the preheated oven and bake for 30 minutes. Rotate the cake 180 degrees and bake for 15-20 more minutes until the fruit is bubbling and the streusel is golden brown. You may need to bake longer if using a bigger baking dish but it should be about the same amount of time as long as your baking dish isn't more than 2" deep.
11 Once baked, remove from the oven and leave to cool for 5-10 minutes on a wire rack just so you don't burn your mouth.
12 To serve, optionally top with vanilla ice cream, whipped cream, or a vanilla custard sauce.