Slice and serve with hot sauce, if desired. Call it what you want—taco flatbread, taco pizza, or taco pie—this is one easy, highly delicious weeknight meal I guarantee your whole family will love.

The birria can be eaten in a bowl like a soup, or in tacos or quesadillas (see Tip). You can make the adobo a day ahead. Heat a frying pan over a medium heat and toast the chillies for 15 seconds ...