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1
Heat the oven to 375.
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2
Grease a 9- by 13-inch pan.
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3
Add the flour, light brown sugar, and salt to the bowl of a food processor.
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4
Pulse once or twice to combine, then add the butter and pulse five or six more times until coarse crumbs form.
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5
Add the oats, Fiber One and pulse two or three more times.
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6
If you don't have a food processor, use a blender to pulverize the Fiber One and then hand mix the ingredients mentioned above.
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7
Remove 1 1/2 cups of the mixture and set it aside.
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8
Add the juice to the remaining mixture and pulse three or four times until it's just moistened.
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9
Press this mixture firmly and evenly into the bottom of the pan using your fingers or the bottom of a measuring cup.
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10
For the filling, whisk together the sugar, flour, and salt in a medium-size bowl.
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11
Add the fruit and lemon juice and gently toss the mixture using a rubber spatula until the fruit is coated.
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12
Distribute the filling over the crust.
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13
Sprinkle the reserved crumb mixture over the filling.
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14
Bake the dish until the top is golden, about 35 to 40 minutes.
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15
Let the pan cool on a wire rack for about 2 hours, then cut the sheet into 12 bars.
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16
Store them in the refrigerator in an airtight container.
