Preheat oven to 425 degrees. Prepare a baking sheet by lightly brushing with olive oil, or a nonstick spray. (You can also use parchment paper, foil, or a silicone baking mat.)
Combine all ingredients, except for the last 5 tablespoons of oat flour or flax in a food processor until pureed into a slightly chunky consistency.
Portion the mixture into 18 balls. Roll each ball in the oat flour or ground flax seed, then press into a disc on the baking sheet.
Bake for 25-28 minutes, or until golden brown and slightly crunchy.
Can serve immediately, or be refrigerated up to three days and reheated in a toaster oven, oven, or skillet.