24 fresh blue and white corn tortillas (16 inches each), or 48 tiny tortillas
Salsa for serving
Combine the cheese, yogurt and cream in a medium bowl. Add the chopped onion, epazote and serrano chile and mix well. Season to taste with salt and pepper.
Spoon the mixture evenly over a tortilla. Cover with another tortilla as if you were making a sandwich. Repeat until all ingredients are used. Heat on a comal or griddle before serving.