In a large bowl, combine the discard, olive oil, and salt. Whisk well to combine. The batter should be smooth without any visible oiliness. Use a whisk or a spatula.

Line a baking with parchment paper. Spread the batter out to the edges of the pan in a smooth even layer. Use a spatula to help you with this step.

Sprinkle the top of the batter with the sesame seeds. The more sesame seeds, the better.

Place baking sheet in the middle of the preheated oven and bake for 30 minutes.

After 30 minutes, remove the pan and use a pizza cutter or a sharp knife to score the batter into cracker-sized squares. (Alternatively, you can skip this step and break the crackers when fully cooked.)

Return baking sheet to the oven and continue baking for 30 additional minutes.

Remove the baked crackers from the oven and allow them to cool completely before breaking them along the scored lines. Store in an airtight container.