Soak dates in boiling water for at least 10 minutes to soften.
Preheat oven to 320°F/160°C. Line a baking sheet with parchment paper or a silicone baking mat.
Drain dates (save 1 tbsp of soaking water)andmash with a fork to form a paste, or blend in a small food processor.
Add sesame paste, miso, vanilla extract, and the reserved tablespoon of soaking water. Mix until well combined.
Combine date mixture with the oats and seeds.
Spread date mixture outon a lined baking sheet. To form clusters, press downwith a spatula to compact the granola, otherwise leave as-is for a loose granola.
Bake for 15-20 minutes until the edges start to brown, then carefullyflip the granola (break it apart into large sections so it's easier to flip) if making clusters, or simply stir for a loose granola.Bake another 10 minutes, then stir and check the granola every 5 minutes and remove any pieces that are browning too quickly. (It should take 30-40 minutes total to bake.)
Remove the granola when it's golden-brown. It will still be a little soft right out of the oven, but it will crisp up as it cools.
Let the granola cool on the baking sheet, then break into clusters and store in an airtight container at room temperature.
Notes
1) Roasted Sesame Paste: Use 4 tbsp if you want thick clusters, but you can get away with 1 tbsp if you want a slightly lower fat/calorie option. 2) Gluten-Free: To make this granola gluten-free, use certified gluten-free oats. Also be sure to use miso that isn't made with gluten-containing grains (like wheat or barley).