Garden Pasta Salad

1/3 cup reduced-fat mayonnaise

1/3 cup low-fat plain yogurt

2 tablespoons extra-virgin olive oil

1 tablespoon red-wine vinegar, or lemon juice

1 clove garlic, minced

1/8 teaspoon salt Freshly ground pepper, to taste

1 cup cherry or grape tomatoes, halved

1 cup diced yellow or red bell pepper, (1 small)

1 cup grated carrots, (2-4 carrots)

1/2 cup chopped scallions, (4 scallions)

1/2 cup chopped pitted kalamata olives

1/3 cup slivered fresh basil