Roll the dough into 1-inch balls then roll in the sanding sugar and place on a plate or baking sheet – you can put them on top of each other – and refrigerate for 30 minutes. You can make ahead of time but if they are refrigerated for more than 30 minutes you will have to let them sit out for a few minutes before proceeding.
Place the balls on the prepared cookie sheets about an inch apart. Flatten with your thumb, making an indentation in each ball. Bake for 10-12 minutes or until firm but not beginning to brown. Leave oven on. If the indentations have risen, use the end of a wooden spoon to depress again. Fill each indentation with a teaspoon of chocolate chips. Return to oven for 2 minutes. Using a small offset spatula or spoon, swirl the chocolate chips to melt. Top each cookie with a maraschino cherry half.