Preheat oven to 320°F. Line a baking sheet with parchment paper or a silicone mat*.
Add date paste, tahini, vanilla extract, lemon juice, and lemon zest to a large mixing bowl. Mix until well combined and a uniform paste forms. If your paste is very thick, add 1 tbsp water to thin it out. It should be easy to mix but thicker than cake batter.
Add oats, nuts, seeds, and cinnamon. Mix well to combine and evenly disperse the ingredients.
Transfer granola to the lined baking sheet. Spread it out into an even layer and press down with a spatula or spoon so the granola is tightly packed (this will help create clusters!).
Place in oven and bake for 15 minutes, then carefully flip the granola over, and continue baking another 10-15 minutes, until golden brown. Keep an eye on the edges as they tend to burn faster.
The granola will still be a little soft out of the oven but will firm up into crunchy pieces as it cools.