Cut the squash in half lengthwise, remove and discard the seeds and then cut into wedges 3/4 inch wide and about 2 3/4 inches long, leaving the skin on and placing the pieces on a baking sheet. Mix together cinnamon, salt, pepper and 2 Tbsp olive oil in a small bowl.
Drizzle the oil mixture over the squash on a baking sheet and mix; making sure that the squash is evenly coated. Roast for 35-40 minutes until soft and starting to color on top. Remove from the oven and set aside to cool.
To make the herb paste, place the cilantro, garlic, 4 Tbsp of olive oil, and the salt in the bowl of a small food processor. Process to a fine paste and set aside.
When ready to serve, mix together the yogurt and Sriracha sauce. Plate with a swirl of the sauce on the plate topped with slices of squash, garnished with the herb paste and pumpkin seeds.