Curried Beef Pitas

Preheat oven to 350 degrees. In 10 inch skillet, cook ground beef, onion, garlic, and curry powder over medium-high heat until meat is tender and brown (about 10 minutes), stirring frequently. Add zucchini, water, salt, pepper, and sugar; heat to boiling. Reduce heat to low; cover and simmer for 15 minutes. Meanwhile, cut each pita in half, arrange in a single layer on a baking sheet, and warm in a 350 degree oven. Stir tomatoes into beef mixture; heat through. Gently open pitas and spoon mixture into pocket, adding a spoonful of goat cheese to the mixture if desired.