Fry Onions And Tomatoes In A Dry Skillet Over Low Heat For 10 Minutes. Prepare A Smooth Sauce In The Processor With The Onion, Garlic, Tomatoes, Oregano, Chiles, Bean Liquid And Achiote. Add This And Beans To A Pot With The Pork And Cinnamon. Simmer For 30 Minutes. Serve Warm With Tortillas.