Offal need to be very fresh - especially kidneys, which will quickly taint and become bitter. It should look glistening and wet (not slimy) and stand firm and proud. Dry, cracked or bad-smelling ...

Offal is often a star in ethnic dishes. There’s certainly no self-respecting taco truck in my neck of the woods that doesn’t offer lengua tacos and a Sunday menudo. My grandparents — the ...