Banana Challah Fritters With Sweet Tahini Sauce

Name: Banana Challah Fritters With Sweet Tahini Sauce
Ingredients: 1 (1 pound) challah bread loaf; 4 large eggs, beaten; 1 3/4 cups mashed very ripe bananas (from about 4 bananas); 1 cup whole milk or unsweetened nondairy milk; 1/2 cup granulated sugar; 1 teaspoon ground cinnamon; 1/2 teaspoon ground nutmeg; 1/2 teaspoon vanilla extract; 1/4 teaspoon salt; 1/2 cup tahini (ground sesame seeds); 3 to 4 tablespoons light agave syrup , as needed; 2 tablespoons fresh lemon juice (from 1 lemon); 1/8 teaspoon salt; 1/4 cup cold water, plus more as needed; 4 cups vegetable oil; 2 tablespoons silan (date honey) (optional); Powdered sugar or cinnamon sugar (optional); Warmed chocolate sauce (optional)