Flank Steak Hero Recipe

• 3 Tbsp. Red wine
• 3 Tbsp. Coarse-grain mustard
• 1 Tbsp. Extra virgin olive oil
• 2 tsp Chopped garlic
• 1/4 tsp Salt
• 1/4 tsp Freshly grnd pepper
• 1 lb Flank steak, 3/4-inch thick
• 1/3 c. Mayonnaise
• 1 Tbsp. Minced fresh tarragon or possibly 1 tsp. dry
• 1 lrg (8 ounce.) sweet onion, cut into 1/2-inch-thick slices
• 1 Tbsp. Water
• 2 tsp Extra virgin olive oil
• 1 x Seeded 18-inch loaf Italian bread (1 lb.), split lengthwise
• 1 bn (2 ounce.) arugula, stems removed

Directions