Sweet Potato Bread Pudding with Pecan Praline Sauce

Name: Sweet Potato Bread Pudding with Pecan Praline Sauce
Ingredients: 2 cups diced peeled sweet potato; ¾ cup water; 3 tablespoons granulated sugar plus 1/4 cup, divided; 3 tablespoons light brown sugar; 1 tablespoon unsalted butter; 1 ½ teaspoons orange zest; ¼ cup orange juice; ¾ teaspoon lemon zest; 2 teaspoons lemon juice; ¼ teaspoon salt; 6 large eggs; 1 ½ cups low-fat milk; ⅔ cup sweetened condensed milk; 1 ¼ teaspoons ground cinnamon; ½ teaspoon vanilla extract; ¼ teaspoon ground nutmeg; 8 cups diced stale French bread, preferably whole-wheat; 4 tablespoons unsalted butter, divided; ¼ cup light brown sugar; ¼ cup granulated sugar; ¼ cup low-fat milk; 2 tablespoons heavy cream plus 3/4 cup, divided; ⅓ cup finely chopped pecans, toasted; ¾ teaspoon vanilla extract; Whipped cream for serving