1-2-3 Peach Cobbler

1/2 tsp ground cinnamon
1 Tbsp vanilla extract
2 Tbsp cornstarch
1 C peach nectar
1/4 C pineapple juice or peach juice (if desired, use juice reserved from canned peaches)
2 can (16 oz each) peaches, packed in juice, drained, (or 13/4 lb fresh) sliced
1 Tbsp tub margarine
1 C dry pancake mix
2/3 C all-purpose flour
1/2 C sugar
2/3 C evaporated skim milk
as needed nonstick cooking spray
1/2 tsp nutmeg
1 Tbsp brown sugar