Preheat your oven to 325°F (163°C) and prepare an 8 x 11-inch pan by lining it with parchment paper or foil.
In a large bowl, combine oats, almond flour, cinnamon, and salt.
Stir using a wooden spoon or spatula until blended.
In a separate small bowl, whisk together pumpkin puree, honey, melted coconut oil, and vanilla until smooth.
Pour the wet ingredients into the bowl containing the oat mixture.
Mix until everything is thoroughly combined.
Fold in the cranberries, pumpkin seeds, and any chopped nuts if desired.
Transfer the mixture to the lined pan.
Use a spatula to spread it evenly, then press down firmly with your fingers to compact the mixture, ensuring the corners and edges are well-packed to prevent crumbling.
Place in the oven and bake for about 35 minutes, or until the edges are golden brown and the center feels firm to the touch.
Allow the pan to cool on a wire rack for 20 to 30 minutes.
Use the parchment overhang to lift the bars out, then let them cool completely on the rack.
For cleaner edges, refrigerate the bars for about 30 minutes before cutting.
Store the bars in an airtight container.
They can be kept at room temperature for 3 to 4 days, in the refrigerator for up to a week, or frozen for 3 to 4 months.