Marinated Bean Salad

Ingredients

• 1 can (15-1/2 ounces) kidney beans, rinsed and drained
• 1 can (14-1/2 ounces) cut green beans, drained
• 1 can (14-1/2 ounces) cut wax beans, drained
• 1 can (15-1/2 ounces) black-eyed peas, rinsed and drained
• 1/2 cup vegetable oil
• 1/2 cup vinegar
• 1/2 cup sugar
• 1/4 cup minced fresh parsley
• 1 teaspoon salt
• 1/2 teaspoon pepper
• 1/2 teaspoon ground mustard
• 1/2 teaspoon dried basil
• 1/2 teaspoon dried tarragon
• 1 medium onion, thinly sliced into rings