Grilled Vegetable Sandwich

• 4 ciabatta rolls, split
• 1 lemon, halved
• 2 tablespoons olive oil
• 1 tablespoon balsamic vinegar
• 3 small zucchini or 3 small summer squash, cut lengthwise in 1/4 inch slices
• 1 small red onion, cut into 1/4 inch slices
• 2 ounces feta cheese, crumbled
• fresh mint leaves, for garnish

1. Lightly brush one tablespoon olive oil on the cut sides of the rolls and lemon halves; set aside.
2. Combine remaining oil and vinegar in a small bowl.
3. Brush a little of mixture on zucchini and onion, then season with salt and pepper.
4. Grill zucchini and onion, over medium heat, until tender, about 2 to 3 minutes per side.
5. Meanwhile toast rolls, cut side down, about 3 minutes.
6. Place vegetables on rolls, top with feta and mint, if using; drizzle with remaining vinegar and oil and squeezed lemon juice.

ciabatta rolls, lemon, olive oil, balsamic vinegar, zucchini, red onion, feta cheese, mint

Taken from www.food.com/recipe/grilled-vegetable-sandwich-389968 (may not work)