Parmesan Caper Deviled Eggs

Name: Parmesan-Caper Deviled Eggs
Ingredients: 12 large eggs; ¼ cup nonfat plain Greek yogurt; ¼ cup mayonnaise; ¼ cup grated Parmesan cheese; 1 tablespoon capers, rinsed; 1 tablespoon minced shallot; 2 teaspoons Dijon mustard; 1 teaspoon white-wine vinegar; ¼ teaspoon salt; ¼ teaspoon ground pepper; 4 grape tomatoes, sliced