Prepare a 9x9 pan with parchment paper.
In a large mixing bowl, mix together the cheerios, coconut, flax seeds, oats, and walnuts.
In a small pan, on medium low heat, melt the peanut butter and honey together until well incorporated.
Take off the heat, and add the vanilla and salt.
Pour the peanut butter/honey mixture over your dry ingredients and stir together well until it is blended throughout.
Pour into your 9x9 pan, and press down so that the top is even.
Put your pan into the fridge for at least one hour for the bars to chill and set.
Cut and enjoy!
Tip: After pouring the ingredients into the 9x9, to get the bars to lay flat I like to spray a spatula with cooking spray and use that to press the food down into the pan.