Ingredients

• 1 teaspoon olive oil
• 1 tablespoon olive oil
• 2 garlic cloves, thinly sliced
• 1/4 teaspoon crushed red pepper flakes
• 1 lb green beans
• 1 small red onion, halved and cut into 1/4-inch slices
• 1 tablespoon red wine vinegar
• 1/4 teaspoon salt
• 2 tablespoons grated parmesan cheese