Spread the sesame seeds out evenly on a baking sheet. Toast in the oven at 300ºF for about 15 - 20 minutes, stirring every few minutes so they don't burn. Toast until the seeds are golden brown.

Allow the seeds to cool slightly, then transfer them to a food processor. Process on high until smooth and creamy, about 15 - 20 minutes. Scrape down the sides of the food processor as needed to get the paste to blend.

Once creamy, pour into a glass container. Store in the fridge or in a cool dark place (like your cupboard!). Tahini will keep for 1 - 2 weeks in the cupboard, 3 - 4 in the fridge.