Mediterranean Beef Kebabs with Greek Salad

Ingredients

• 1 1/2 pounds beef sirloin
• 1/2 cup plain Greek yogurt
• 1 medium red onion
• 1 medium green bell pepper
• 1 medium red bell pepper
• 1/2 cup cherry tomatoes
• 1 cucumber
• 1 head romaine lettuce
• 1/4 cup olive oil
• 2 tablespoons red wine vinegar
• 1 tablespoon lemon juice
• 1 teaspoon Dijon mustard
• 1 teaspoon honey
• 2 teaspoons dried oregano
• 1 teaspoon dried basil
• 1 teaspoon garlic powder
• 1/2 teaspoon salt
• 1/4 teaspoon black pepper