Pesto Potato Salad - I Feel Like Cooking

Ingredients

• 6 C new potatoes, cut into chunks
• 3 yellow cucumbers
• ½ pint orange grape tomatoes
• 1/3 C thinly sliced Walla Walla onion + 1 t more onion for pesto
• ¼ C rice wine vinegar
• Salt and pepper to taste