In a small bowl, mix the warm milk with the instant yeast and a teaspoon of sugar. Allow it to sit for about 5-10 minutes until foamy.

In a large mixing bowl, combine the flour, remaining sugar, and salt.

Create a well in the dry ingredients and pour in the sweetened condensed milk, activated yeast mixture, and melted butter (or margarine).

Mix everything until you get a soft dough. Knead on a floured surface for about 8-10 minutes until smooth and elastic.

Place the dough in a greased bowl, cover it with a clean cloth, and let it rise in a warm place until it doubles in size, approximately 1-2 hours.

Once the dough has risen, punch it down and knead it briefly. Shape it into a loaf and place in a greased bread pan.

Cover again and let it rise for another 30 minutes or until it bounces back when lightly poked.

While the dough rises, preheat your oven to 350°F (175°C).

If using an egg wash, beat the egg and brush it over the top of your loaf. Bake for 25-30 minutes or until golden brown and cooked through.

Once done, allow it to cool in the pan for a few minutes before transferring to a wire rack.