Place the milk and butter in a microwave safe bowl. Heat for 1 minute or until just warm.

Pour the milk mixture into a large bowl along with the brown sugar and yeast. Mix well.

Add in the salt and 3 cups of flour and mix well. Turn the dough onto a flour dusted surface and knead for 5-7 minutes, working in an addition 1/4 cup-1 cup of flour.

Spray a large bowl with cooking spray. Place the dough in the bowl and turn once, coating with oil. Cover with a dish towel and allow to rise for 1 1/2 hours or until doubled.

Preheat the oven to 400 degrees. Spray two baking sheets with cooking spray.

Turn the dough onto a cutting board and cut into 18 equal pieces. Gently press each piece flat.

Place a teaspoon of chorizo and a sprinkle of cheese in the middle of each dough. Pinch the edges together and pull into a ball shape.

In a large pot bring water and baking soda to a boil. Add the dough balls 5 at a time, boiling for 1 minute.

Remove from the pot and place on prepared baking sheets.

Carefully slice a small x shape on top of each roll, making sure not to cut to deep.

In a small bowl beat the egg along with 1 tablespoon of water. Brush the tops of each with the egg wash and sprinkle with sea salt.

Bake for 15-20 minutes or until the rolls are golden brown. Remove from oven and serve warm.