Preheat your oven to 350°F (175°C).
In a large bowl, combine cornmeal, salt, garlic powder, spinach powder, and cumin.
Add warm water and olive oil to the dry mixture.
Stir until a dough forms. If too dry, add a bit more water; if too wet, sprinkle in more cornmeal.
Roll out the dough to about 1/8 inch thickness between two sheets of parchment paper.
Cut the rolled-out dough into shamrock shapes using a cookie cutter.
Place the cutouts on a baking sheet lined with parchment paper.
Bake for 15-20 minutes or until edges are crisp and lightly browned.
Remove from the oven and allow to cool before serving.