Place seeds in a mixing bowl. Pour melted butter over seeds; stir to coat. Combine 1 teaspoon vanilla sugar (see Cook's Note), 1 teaspoon cinnamon, and 1/2 teaspoon white sugar in a small bowl; mix well. Stir in vanilla extract. Spread sugar mixture over seeds, stirring to coat evenly.
Spread seeds over a baking sheet in a single layer. Combine 1 teaspoon vanilla sugar and 1 teaspoon cinnamon in a small bowl; sprinkle over seeds.
Bake seeds in the preheated oven for 30 minutes. Remove baking sheet from oven, stir seeds, and spread evenly on baking sheet again. Combine 1 teaspoon vanilla sugar and 1 teaspoon cinnamon in small bowl and sprinkle over seeds. Return seeds to oven for 30 more minutes.
Remove seeds from oven. Sprinkle remaining 1/2 teaspoon vanilla sugar over seeds, and return to oven for 5 minutes. Remove from oven, pour into a serving bowl, and serve warm.
Actual baking time may vary depending on how wet or dry your seeds were to begin with.
Vanilla bean sugar can be found in specialty shops or online, or you can make your own by storing a clean, dry vanilla bean in a jar of granulated sugar. (This is a great way to get more flavor out of vanilla beans you've scraped and used for other desserts.)
Per Serving: 219 calories;18.7 g fat;
8 g carbohydrates;
8.5 g protein;
8 mg cholesterol;
27 mg sodium.