"This is a substantial sandwich,tender flank steak that I marinaded in chimichurri and pan seared. I grilled the brioche that's cut extra thick, made a chimichurri mayonnaise, and added slices of fresh tomato. The steak would be equally delicious grilled. - sdebrango..."
INGREDIENTS
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1 1 1/2 to 2-pound flank steak
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1 cup flat leaf parsley cleaned and large stems removed, finely chopped (by hand or use food processor)
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1/2 cup baby arugula, finely chopped (by hand or use food processor)
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2 cloves garlic, minced (you can add to parsley and arugula in food processor)
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1/4 teaspoon dried oregano
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1/4 teaspoon crushed red pepper flakes
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1/2 cup \n2 tablespoons olive oil\n\n
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2 tablespoons red wine vinegar
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salt and pepper to taste
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1 brioche pullman loaf or if you prefer a white pullman loaf
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1/4 cup mayonnaise
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1 beefsteak or heirloom tomato, sliced
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Soft butter for bread
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salt before you sear and pepper after
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2 tablespoons Chimichurri to mix with mayonnaise