In a large bowl, whisk together the banana, pumpkin, honey, vanilla, and spices.
Add the oats and mix until combined. Fold in the chocolate chips.
Transfer the mixture to the prepared pan, pressing lightly until evenly distributed.
Bake for 30 - 35 minutes until firm and golden brown around the edges. Allow to cool completely in the pan on wire rack before cutting into bars.
Bars stay fresh, stored in an airtight container, at room temperature or in the fridge for up to 1 week. They also freeze well for up to 3 months. Thaw overnight in the fridge before serving.
The calories are an estimate only. 205 calories for 9 long bars, as pictured.