Line a 9 x 13" pan with parchment paper leaving an overhang on the 9 inch side. Coat with cooking oil spray

In a large bowl stir together oats, oats bran, flaxseed, flour, baking powder, salt, peanuts, cranberries, and figs until well blended

Mix together peanut butter, milk, egg, honey, lemon zest, and lemon juice until well blended

Add flour mixture to peanut butter mixture and beat until completely blended

Scrape dough into pan and, with wet fingers or a rubber spatula, fill pan completely and evenly. Chill dough until firm approximately 30 minutes

Preheat oven to 300°

Lift dough out of pan using parchment paper. Cut bars lengthwise, down the middle. Cut bars crosswise, at 1 1/2 inches wide, making approximately 16 bars

Place bars about 1 inch apart on the baking sheet lined with parchment paper.

Bake bars for 20 minutes, or until lightly browned and somewhat firm to the touch.
Remove from oven and let cool completely.