Preheat oven to 350°F (175°C).

Line a baking sheet with aluminum foil.

In a large pot, cover the spareribs with water and add salt.

Bring the water to a boil, then let it boil for 5 minutes.

Drain the ribs and transfer them to the prepared baking sheet.

Use a pastry brush to coat both sides of the ribs with mustard.

Bake on the lower shelf of the oven for 15 minutes.

Remove the ribs from the oven.

Use a pastry brush to generously coat the ribs with barbecue sauce.

Return the ribs to the oven and bake for 1 hour and 15 minutes, or until tender.

Brush the ribs with barbecue sauce several times during the baking process.

If the ribs start to stick to the baking sheet, add a few teaspoons of warm water.

Serve the barbecued pork ribs hot.