Preheat your oven to 350°F (175°C). Line a baking sheet with parchment paper.
Rinse the quinoa under cold water to remove its natural coating (saponin), which can be bitter.
In a mixing bowl, combine the rinsed quinoa, olive oil, honey or maple syrup, vanilla extract, and salt. Mix well until the quinoa is evenly coated.
Stir in the chopped almonds, walnuts, pumpkin seeds, and sunflower seeds until everything is well combined.
Spread the quinoa mixture evenly on the prepared baking sheet.
Bake in the preheated oven for about 15-20 minutes or until the quinoa is golden brown and crunchy. Stir the mixture halfway through to ensure even baking.
Remove from the oven and let it cool completely. If desired, mix in the dried cranberries once cooled.
Once cooled, break apart any clumps and store the Quinoa Crunch in an airtight container.