I don’t have exact measurements but I put a tomato, medium sized onion, 5 cloves of garlic, a heaping spoonful of tomato paste and olive oil all into a food processor and blended it. I then added salt, pepper, cumin and oregano all to taste and blended it some more. The consistency should be a little thicker, not too watery. I cubed up chicken breast and sirloin (I think lamb is best for this though) and I tossed it in the marinade and let it sit for about 6 hours. If I can I let it sit overnight, but even after a couple hours the beef should still be nice and tender. Then skewer it and cook it over coals or on a grill.
