Heat oven to 375°F. Scrub potatoes; prick all over with fork. Place in shallow baking pan or pie pan (do not use glass). Bake 55 to 65 minutes or until tender.
Set oven control to broil. Cut potatoes lengthwise in half. Mash cut sides slightly with fork. Spoon pineapple over cut sides of potatoes. Top with sunflower nuts and brown sugar.
Broil with tops 4 to 6 inches from heat 2 to 3 minutes or until brown sugar is bubbly.