Suz's BBQ Sandwiches

2 cups shredded cooked pot roast
½ cup chopped onion
2 T butter
1 cup Ketchup
¼ tsp salt
1T Sugar
pepper
1T liquid smoke

Sauté butter and onion until onion is tender, add the rest of the ingredients for the sauce bring to a boil. Cover and simmer on low for 10 min. Add meat and simmer for 5 more min.