Watermelon Barbecue Sauce

1 − 6 Pound Seedless Watermelon chunk
8 Ounces Tomato Paste
1 Tablespoon Onion Powder
1 Tablespoon Garlic Powder
2 Cups Firmly packed brown sugar
1/2 Cup Sherry
2 Teaspoons Lemon juice
1 Teaspoon Liquid smoke

Cut the melon into pieces and place in a saucepan. Cook it uncovered over medium heat until the melon is the consistency of applesauce (approximately 2−3 hours). Stir it occasionally. Add remaining ingredients. Simmer uncovered over low heat for 2 hours. Allow to cool to room temperature before using.