How to Make It
Squeeze half a lemon over each avocado half and sprinkle with the Everything mix. Toast not needed, but I won’t stop you.
Place the white sesame seeds, black sesame seeds, caraway seeds, and poppy seeds in a small skillet. Toast them over medium heat until the sesame seeds are golden brown and the caraway is fragrant, about 3 minutes (don’t walk away here; sesame seeds burn super quickly, especially around the edges of the skillet). Remove from the heat and add the onion (if using) and salt. Let cool completely before storing in jars. DO AHEAD: This can be made 1 month ahead and stored at room temperature.