This pineapple-based sauce is a nice change from the pickle and mustard based sauces that we usually have with hot dogs and hamburgers.
1 medium onion, chopped
2 tablespoons butter
2 tablespoons cornstarch
2 cups crushed pineapple in its own juice
3 tablespoons cider vinegar
1/2 teaspoon curry powder
1/4 teaspoon cumin
Sauté the onion in butter until soft. Stir in the cornstarch. Add the pineapple, stir, and heat until bubbly. Add the vinegar.
Stir in the curry and cumin and heat for another minute or two.