Preheat oven to 350 degrees F.
Sprinkle 1 side of the roast with 2 tablespoons of the House Seasoning, making sure to rub well. Flip the roast over and rub the remaining 2 tablespoons of House Seasoning. Repeat the process with the seasoned salt and liquid smoke. Place the roast in a large roasting pan. Add the onion, water and bay leaves to the roast. Place in the oven and cook for 2 1/2 to 3 hours, or until thermometer reads 170 degrees F. Let meat cool for a few minutes and then slice.
Serve with your favorite barbeque sauce.
Mix ingredients together and store in an airtight container for up to 6 months.