Heat oil in a large skillet, add onions and cook, stirring, until translucent, about 2 minutes.
Add garlic and cook for 1 minute, stirring constantly so as not to burn the garlic.
Add tomato (optional) and stir. Add flour and stir for another 2 minutes.
Add the roasted Anaheim chiles and jalapeño peppers and let simmer for 2 minutes, stirring constantly to combine all the flavors together.
Add the suero and bring to a boil. Stir in the cheese. Cover and remove from the heat. Allow the cheese to melt before serving. Add salt to taste.
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