Slow Cooker Almond Joy Candy

semi-sweet (about 2 cups)

Almond Bark Chocolate Baking Bar (1/2 package)

German baking chocolate bar (or milk chocolate), chopped

sliced almonds (I have also used whole roasted and chopped - use whole for a bigger crunch and sliced and chopped if you prefer less of a crunch) plus 40 more whole almonds for topping the center of candy, if desired)

unsweetened finely shredded or desiccated coconut (plus more as needed to hold candy together and for sprinkling, if desired)