Sticky Bun Bread Pudding

Name: Sticky Bun Bread Pudding
Yield: 6 Servings
Ingredients: 4 large eggs; 2 cups plus 2 tablespoons (or more) half and half; 1 teaspoon vanilla extract; 1 cup chopped pecans; 1/2 cup (packed) golden brown sugar; 2 1/2 teaspoons ground cinnamon; Butter, room temperature; 8 1-inch-thick slices from day-old large loaf of challah, crusts removed; 1 cup powdered sugar