Yogurt

1 (18.25 ounce) package yellow cake mix
1 (3.5 ounce) package instant vanilla pudding mix
1/3 cup vegetable oil
4 eggs
1 cup plain yogurt
1 tablespoon unsweetened cocoa powder
1/2 cup chopped walnuts
1 teaspoon ground cinnamon

2 cups mayonnaise
1/4 cup chopped fresh chives
1/4 cup chopped fresh parsley
1 1/2 cups sour cream
1/3 cup plain yogurt
1 tablespoon distilled white vinegar
1 teaspoon dried tarragon
1 lemon, juiced
1 teaspoon minced garlic

1 1/2 cups vanilla or plain yogurt
2/3 cup orange juice
2 ripe bananas, cut into chunks
1 cup halved fresh strawberries
2 teaspoons honey

1 (6 ounce) can tuna, drained and flaked
1/4 cup thinly sliced celery
1/4 cup chopped walnuts
1/4 cup plain yogurt
3 tablespoons sweet pickle relish
1 green onion, sliced
2 (6 inch) pita breads, halved

3 large peaches, peeled and cut into chunks
1 1/2 cups blueberries
1 1/2 cups sliced strawberries
2 bananas, sliced
3 teaspoons lemon juice

Orange-Yogurt Sauce:
1 cup vanilla nonfat or low-fat yogurt
2 tablespoons frozen orange juice concentrate

3/4 cup milk
1/2 cup margarine, at room temperature
1/2 cup Greek yogurt
3 1/2 cups all-purpose flour
1 tablespoon salt
1 tablespoon baking powder
1 egg white