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Ingredients

• .25 cup(s) soy sauce
• .25 cup(s) balsamic vinegar
• 1 tablespoon(s) brown sugar
• 1 teaspoon(s) fresh thyme leaves
• .25 teaspoon(s) ground pepper
• 1  (1 1/4-pound) beef flank steak
• 1 medium (8-ounce) red onion, cut into 4 thick slices
• 8 slice(s) sourdough bread, toasted on grill if you like
• 2 medium ripe tomatoes, sliced
• 1 bunch(es) arugula, tough stems discarded

Description

.25   Cup(s) Soy Sauce .25   Cup(s) Balsamic Vinegar 1 &nbs

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