Toast the sesame seeds. Heat a skillet or frying pan over medium-low heat. Add the sesame seeds to the dry pan. Stir or shake the pan frequently to prevent burning.
Toast the seeds for about 10 minutes, or until they turn golden brown and give off a fragrant, nutty aroma. (For black sesame seeds, look for a slight popping sound). A good way to check wether they are not raw anymore is to check with a spoon, if they stick to the spoon it means they are still raw. if they slide from it, they aren't. You will still want to cook them for a bit longer from when this happnes, as you want them golden brown
Toast the salt for a few minutes as well (optional)
Remove the seeds from the heat and let them cool for a few minutes.
Grind the sesame seeds and salt: Once the seeds have cooled, place them in a mortar and pestle along with the sea salt.
Gently grind the seeds and salt together, just enough to break up the seeds slightly and mix them well with the salt. The goal is to create a textured seasoning, not a fine powder. Ideally you0d want about 40% of the seeds still intact.
Alternatively, you can pulse the mixture briefly in a food processor.
Variations: You can add in some seaweed, or sumac and thyme for a za'atar style gomasio, chili flakes, literally anything you fancy.
Store and use: Transfer your gomasio to an airtight jar or container. It can be stored for up to a week at room temperature or longer in the fridge.
Sprinkle it over rice, noodles, vegetables, avocado toast, or even popcorn for an extra burst of umami flavor.