Summer Macaroni Salad with Tomatoes and Zucchini

Bahan-bahan (16 porsi)

• 16 oz uncooked elbows
• 4 cups grape tomatoes (cut in half)
• 2 cups 1 small zucchini, sliced and quartered
• 1/2 cup red onion (finely chopped)
• 7 tbsp light mayonnaise (Hellman's)
• 2 1/2 tbsp red wine vinegar
• 2 tbsp fat free Greek yogurt
• 2 tsp Dijon mustard
• 1/4 tsp oregano
• 1/4 tsp garlic powder
• salt and pepper to taste