Flank Steak Sandwiches with Bleu Cheese

Ingredients

• 2 large sweet onions
• 4 TBSP extra virgin olive oil, divided
• 1/2 tsp salt
• 1/2 tsp pepper
• 3 red bell peppers
• 6 (2- to 3-oz.) ciabatta or deli rolls, split
• 5 oz soft ripened blue cheese
• 1 1/2 cups loosely packed arugula
• ~ 6 TBSP mayonnaise
• 1/2 small sweet onion, minced
• 3 garlic cloves, minced
• 1/4 cup extra virgin olive oil
• 2 TBSP chopped fresh basil
• 1 TBSP chopped fresh thyme
• 1 TBSP chopped fresh rosemary
• 1 tsp salt
• 1/2 tsp dried crushed red pepper
• 1 lemon (or 2 TBSP total juice)
• 1 3/4 pounds flank steak