Preheat your oven to 350°F (175°C).
In a mixing bowl, combine sourdough discard, flour, olive oil, salt, garlic powder, onion powder, and dried herbs.
Mix until a dough forms. If too dry, add water a tablespoon at a time.
Turn the dough out onto a lightly floured surface.
Roll the dough out to about 1/8 inch thickness.
Cut the rolled dough into desired shapes (squares or circles).
Place the crackers on a baking sheet lined with parchment paper.
Sprinkle with coarse sea salt and sesame seeds if using.
Bake in the preheated oven for 20-25 minutes or until golden brown and crisp.
Allow to cool completely before serving or storing.