Add the cold chopped butter. Rub it into the mixture using your fingertips.
Add chopped walnuts and mix.
Preparation of the Fruit Layer:
Grease 4 ramekin bowls or any heatproof bowls with butter.
Mix chopped nectarine and blueberries in a bowl.
Sprinkle sugar, flour and cinnamon powder over the fruit. Mix it gently.
Add water and mix.
Divide the mixture between the 4 ramekins.
Sprinkle the topping over each fruit layer.
Bake the crisp for 30 minutes. The fruit will be all bubbly and the topping should become golden brown.
Take the dessert out of the oven and serve warm topped with ice cream or whipped cream.
Notes
Can bake in a baking tray which is 8" X 8".
Use any fresh fruit of your choice.
Can use frozen fruit. Let it thaw a bit before baking.
For gluten free version replace the flour with oat flour.
For a vegan friendly dessert, omit butter and use coconut oil, oil or a vegan friendly butter. Serve with a vegan friendly ice cream or whipped coconut.