In a bowl, combine all-purpose flour, oats, baking soda and salt. Set aside
Beat butter and brown sugar with an electric mixer for 3 minutes.
Add the egg and vanilla and beat again until fully combined, about 2 minutes. Scrape down the bowl with a rubber spatula.
Add the dry ingredients and beat again just until combined.
Stir in the chopped chocolate and dried cherries.
Line a baking sheet with parchment and drop cookie dough by the 1 1/2 tbsp onto the baking sheet, about 3 inches apart.
Bake for 10-12 minutes, until just starting to brown around the edges.
Immediately upon removing from the oven, use a round cookie cutter, large glass or the curve of a fork to gently push the edges of the cookie toward the center to make a perfectly circular cookie.
Allow cookies to cool on the sheet for 10 minutes before transferring to a wire cooling rack and sprinkling with sea salt.