01 -  Preheat oven to 350°F. Line an 8x8-inch baking pan with parchment paper, leaving an overhang for easy removal. 
 02 -  In a large mixing bowl, thoroughly combine rolled oats, ground flaxseed, chopped roasted peanuts, shredded coconut if desired, and salt. 
 03 -  In a small saucepan over low heat, gently melt peanut butter, honey or maple syrup, and coconut oil until smooth. Remove from heat and stir in vanilla extract. 
 04 -  Pour the melted wet mixture over the dry ingredients. Mix until the oats and nuts are evenly coated. 
 05 -  Transfer the mixture into the prepared pan. Press firmly and evenly into the pan using a spatula or clean hands. 
 06 -  Bake for 18 to 20 minutes, or until edges are lightly golden. 
 07 -  Allow to cool completely in the pan on a wire rack. Lift out with the parchment overhang and cut into 16 squares.