Beef, Sweet Peppers and Mushroom Kabobs with Cucumber-Yogurt Sauce

Ingredients

• 1 pound beef Top Sirloin Boneless cut 1 inch thick
• 8 ounces medium mushrooms
• 2 medium red, yellow or green bell peppers, cut into 1-inch pieces
• Salt
• 2 tablespoons olive oil
• 1 tablespoon chopped fresh oregano or 1 teaspoon dried oregano leaves
• 2 cloves garlic, minced
• 1/2 teaspoon ground black pepper
• 1/2 cup plain yogurt
• 1/3 cup finely chopped seeded cucumber
• 2 tablespoons crumbled feta cheese
• 1 clove garlic, minced
• 1/4 teaspoon ground black pepper
• 1/8 teaspoon salt