It's not very spicy, so those of you who like really spicy food will want to modify the seasonings.
Water saute the onions and garlic until carmelized.
When soft and browned, add chili powder and cumin. Continue to cook and stir until spices are fragrant. When hot, adjust seasonings and set aside. Stir cornmeal slowly into boiling water. Cook and stir until thick, adding the salt and chili powder once the mixture comes to a boil.