Natilla (Puerto Rican Custard Dessert)

Name: Natilla (Puerto Rican Custard Dessert)
Prep time: 5 min
Cook time: 15 min
Total time: 20 min
Cuisine: Latin American
Ingredients: 2 cups whole dairy milk; 2 tbsp corn starch; 4 egg yolks; 1/2 cup granulated sugar; 2 2 inch pieces of lemon peel; 1 whole cinnamon stick; 1/8 tsp salt; 1 tsp vanilla extract; ground cinnamon (for garnish)