Brown hamburger and onions until the hamburger is cooked. Drain grease. Sprinkle flour, garlic, salt, cumin, oregano, and chili powder over cooked meat and onions. Stir well. Add canned tomatoes and water. Stir well. Taste and adjust the seasonings or water to your liking. Bring to a boil and reduce to a simmer. Cook for 2 - 3 hours on low. Add salt to taste.
You may use a can of Rotel and a small can of tomatoes for a little heat in place of the large can of tomatoes.
You may add two cans of pinto beans - don't drain, juice will help thicken chili.