Preheat your oven to 350°F (175°C) and line a 8x8 glass baking dish with parchment paper or lightly grease it.
In a large bowl, combine the oats, rice crisps, chia seeds, ground flaxseeds, cinnamon, and a pinch of salt. Set aside.
In a small saucepan over low heat, combine peanut butter, maple syrup, melted coconut oil, and vanilla extract. Stir until the mixture is well combined and smooth.
Pour the wet mixture over the dry ingredients and mix thoroughly until everything is evenly coated. Fold in dried blueberries and sunflower seeds.
Transfer the mixture to the prepared baking dish and press it down firmly with the back of a spatula or your hands. Ensure it's packed tightly and evenly.
Bake in the preheated oven for 15 minutes or until the lightly browned.
Remove the baking dish from the oven and let it cool for 15 minutes before transferring to the fridge for 1 hour. This will allow the granola bars to firm up and hold their shape.
Once cooled, use a sharp knife to cut the granola mixture into bars or squares of your desired size. (Mine made 8 bars)
Store the granola bars in an airtight container on the counter for 4 days or in the fridge for 10 days.