Crush the garlic cloves, then mix them with the remaining marinade ingredients. Rub both sides of the meat with the marinade (which will be more like a paste), then place it in a plastic bag or shallow bowl with a cover. Keep it refrigerated until ready t
Crush or mince the garlic. Clean the parsley, removing the tough stem ends. Chop the parsley medium-fine, then mix it with the remaining ingredients. A food processor works well here; place the parsley leaves (and small stems) in the bowl of your food pro
Slice the onion and pepper thinly, and stir in the remaining ingredients. Let the salad sit for several hours (or overnight) in the refrigerator; it'll soften nicely, and the flavors will meld.
Grill the steak to the degree of doneness you like. Let it rest for 5 minutes off the grill, to help it retain its juices. Slice it thinly across the grain. Spread some chimichurri sauce on the warmed bread, add thin slices of meat, then top with the pepp