For the sauce: Simmer pork in broth 5-10 minutes. Add canned tomatoes, tomato sauce, garlic, green chilies, hot peppers, sugar and salt. Let simmer 45 minutes. Dissolve the 2 tablespoons flour in the 1/4 cup water and add to sauce to thicken slightly.
For filling: Brown hamburger and onion;drain grease. Add refried beans and blend together over low heat.
Wrap flouor tortillas in foil and warm in oven.
To serve:spoon bean and hamburger mixture on warm tortillas.Roll up tortillas and top with pork sauce.
Top with cheese, lettuce and tomatoes. Then top with sour cream, if desired