Preheat oven to 375 degrees. In a large saucepan, melt
butter and cook garlic with onion soup mix over medium
heat until garlic is golden. Stir in tomato sauce, sugar,
soy sauce, vinegar and chili sauce. Bring to a boil, then
simmer, stirring occasionally, 15 minutes. Meanwhile, in
large aluminum-foil-lined baking pan, arrange spareribs
meaty side up and bake for 20 minutes. Brush spareribs
generously with sauce, then continue baking, meaty side
up, brushing occasionally with remaining sauce, 50 minutes
or until spareribs are done.