What is sangre en la bica?

"Sangre en la bica" is a Spanish expression that translates to "blood in the white sauce". It is a popular dish in the cuisine of the Spanish region of Extremadura, traditionally made with pork liver and onions cooked in a white sauce made with flour, milk, paprika, and olive oil. The dish usually is served with crusty bread or potatoes. The name of the dish comes from the red color that the sauce turns due to the liver's blood when it is cooked. It is a hearty, flavorful dish that has been enjoyed in Spanish households for generations.