Preheat the oven to 350°F
Combine the flour, brown sugar, oats, baking powder and sea salt for the oatmeal bars together in a large bowl.
Add the butter and mix with your hands to form a crumbly mixture.
Press the mixture into a 9 x 13 baking dish sprayed with cooking spray.
Place the peaches and apricots on top.
Combine the flour, brown sugar and cinnamon for the crumble in a small bowl.
Add the remaining butter, mix into a coarse crumble and sprinkle over the peaches and apricots.
Bake for 45-50 minutes.
Allow to cool AT LEAST 30 minutes before slicing into bars.
Store leftover bars in the refrigerator for up to 3 days.
