Place a soup pot or Dutch oven over medium heat and wait about a minute. Add the olive oil, wait a few seconds more, then swirl to coat the pan.
Add the onion and cumin, and cook over medium heat, stirring often, for about 5 minutes, or until the onion becomes translucent.
Coarsely chop the Roasted Bell Peppers, then stir these in, along with the garlic and salt. Lower the heat, cover the pan, and let the vegetables cook together for about 5 minutes, stirring occasionally.
Gradually sprinkle in the flour. Cook over low heat, stirring vigorously to keep the flour from lumping, for about 3 minutes, or until very thick.