Grilled Fish with Pineapple-Cilantro Sauce

1 md pineapple about 2 lb, cut into 1" chuncks
2 tbsp cold water
2 tbsp NutraSweet
3/4 cup unsweetened pinapple juice
Salt and pepper to taste
2 tbsp lime juice
2 cloves garlic, minced
6 oz Halibut, Haddock, Salmon steks or fillets
1/2 ts Jalapeno pepper
2 tbsp minced cilantro
1 tbsp cornstarch

Heat pineapple, juices, garlic and Jalapeno pepper to boiling in a medium saucepan. Reduce heat and simmer, uncovered about 5 minutes. Stir in cilantro. Heat to boiling.
Mix cornstarch and cold water, Stir into boiling mixture. Boil, stiring constantly, until thickened. Remove from heat; Cool 2-3 minutes.
Stir in NutraSweet (r) Spoonfull (tm); Season to taste with salt and pepper. Serve warm over fish or pork.