Line a baking sheet with a nonstick baking sheet, parchment, or wax paper. Set aside. In a medium saucepan combine the oats, peanut butter, chocolate, butter, and salt over medium heat. Cook, stirring constantly, until the chocolate is melted and the ingredients are well-combined. Using a small ice cream scoop or a tablespoon, spoon the mixture onto the prepared baking sheet. Set aside to firm up and set. They can be stored in the refrigerator in an air-tight container for 1 week.