1. Preheat oven to 375ºF. Mist a 24-cup mini muffin tin with cooking spray. Combine flour, baking soda and salt in a bowl.
2. In a large mixing bowl, mix together butter and brown sugar. Add egg and vanilla and whisk until smooth. Add flour mixture and stir until just incorporated. Stir in chocolate chips, nuts and dried cherries.
3. Spoon some cookie dough into each muffin cup, so dough comes just to tops of cups (cookies won't rise much).
4. Bake until cookies are golden around edges and just set in center, 10 to 12 minutes. Remove tin to a wire rack and let stand 5 minutes before removing cookies to cool completely on rack.