In bowl, cream butter and sugars; add flaxseeds. In another bowl, beat eggs and vanilla together. Combine with flax mixture. Sift together the flour and baking soda. Mix in oatmeal and combine with other ingredients. Form dough into 1-1/2” round logs. Place in freezer and chill.Preheat oven to 350°. Slice dough logs into 1/4” medallions. Place on parchment lined baking sheet leaving about 2” space between cookies. Bake 13-15 minutes. Remove from sheet and cool on wire rack. Makes approximately 108 cookies.