Line a 9x9 pan with parchment paper. Preheat oven to 350
Toss Strawberries and bananas with the juice of 1/2 of a lemon, the white sugar blend, and corn starch.
Combine rest of ingredients (oats, flour, brown sugar blend, salt, spices, butter and egg) until it forms a sort of loose dough/paste. Press about 1/3 of it into the bottom of your pan.
Spread an even layer of fruit over the dough with a slotted spoon (reserve liquid). Reserve remaining fruit.
Lightly press about half of your remaining dough into the cracks and crevices around the fruit. Use a light touch--you don't want to crush your fruit!
Cover that layer with whatever fruit remains, and then lightly press the remaining dough around the fruit. Drizzle your reserved liquid evenly over the top.
Bake at 350 for 40-55 minutes. The dough will set pretty quickly but the fruit will take time to swell and burst from the heat. Look for the fruit bubbling in the cracks and crevices and along the edges of the pan!
Allow to cool completely and refrigerate for 1 hour. Depan and cut into bars.
These are safe stored in an airtight container at room temperature for a day or two, but should be refrigerated or frozen past that.