Preheat oven to 350. Spray a 13×9 glass pan with spray oil.

Place cubed zucchini in large pot with the lemon juice. Bring to boil. Stir. Simmer for 7 minutes.
Add brown sugar, cinnamon, and nutmeg. Stir. Cover and simmer 10 minutes.

Place zucchini mixture in prepared pan. Set aside.

Mix flour, salt, baking powder, and sugar. Cut in butter until crumbly. Add eggs, one at a time, while mixing. Add vanilla. Stir in milk/vinegar mix. Do not over stir!

Pour flour mixture on top of zucchini mixture and bake for 40 minutes.