Souvlaki Moskhari is the beef version of the skewer: cubes of beef threaded onto a stick and grilled over coals. Moskhari is the meat, and it is the least common of the souvlaki proteins, sitting apart from the everyday pork and chicken. Beef brings a denser chew and a deeper, more mineral flavor than either, and that changes how the skewer is handled from the cut through the fire.
The cut decides the result. Beef destined for a skewer wants a tender muscle and clean cubing; a tough cut grilled hard over coals turns to leather no matter the marinade. The usual treatment applies, olive oil, lemon, oregano, garlic, salt, but beef benefits from the oil and acid more than pork does, because there is less intramuscular fat to keep it forgiving. Threading follows the same rule as the rest of the family: cubes spaced with a breath of air so each face meets direct fire instead of steaming against its neighbor. The fire is hot and fast and the timing is short. Good execution is a deep crust on the corners, an interior still pink and juicy, meat that yields under the tooth rather than fighting back. Sloppy execution is beef cooked the way pork tolerates being cooked, too long, all the way through, gray and chewy, the mineral flavor gone flat and the texture turned to rope. Beef punishes overcooking faster and more visibly than the fattier proteins, which is why it is the skewer that most exposes a careless grill.
Off the skewer it is a kalamaki, eaten with lemon and oregano like its pork and chicken siblings, and the same beef cubes folded into a pita with tzatziki, salad and fries become a wrapped handheld, that pita format distinct enough to deserve its own article rather than being crowded in here. The mixed-meat skewer puts beef beside other proteins on one stick and is its own entry with its own timing problem. What does not change is the souvlatzidiko logic underneath all of them: small skewers, hard fast fire, finished to order and never held warm, a discipline that beef rewards and exposes more plainly than the rest.