Step by Step Guide:

1. Prepare Yeast Mixture:
   • Heat milk in the microwave for 20 seconds. It should be warm, not hot.
   • Dissolve 1 tbsp of sugar and the yeast in the warm milk. Whisk until smooth and let it sit for 5-10 minutes until frothy.
2. Mixing the Dough:
   • In a large bowl, combine flour, remaining sugar, and salt.
   • Add in softened butter or shortening, the egg, and the yeast mixture.
   • Mix with a spatula until a sticky dough forms.
3. First Rise:
   • Shape the dough into a ball, dust with a little flour.
   • Cover with a damp cloth and let it rise at room temperature for 1.5 hours, until doubled in size.
4. Pan Preparation:
   • Lightly grease a 10-inch tart pan with cooking spray or butter.
5. Forming the Brioche:
   • On a floured surface, roll out the dough to fit the tart pan.
   • Transfer the dough to the pan, pressing it gently to fit the bottom and sides.
   • Cover and let rise for another 45 minutes.
6. Preheat Oven:
   • Preheat the oven to 350°F (175°C).
7. Prepare Brioche for Baking:
   • Gently prick the dough all over with a fork.
8. Prepare Topping:
   • In a bowl, whisk together the eggs and heavy cream.
9. Assembling:
   • Evenly spread brown sugar over the surface of the risen dough.
   • Pour the egg and cream mixture over the sugar.
   • Dot the top evenly with pieces of butter.
10. Baking:
    • Bake in the preheated oven for 25 to 30 minutes, or until golden brown and set.
    • Let cool slightly before serving, enjoy warm for the best flavor!