Caramel Eclairs

Name: Caramel Eclairs
Prep time: 20 min
Cook time: 30 min
Total time: 50 min
Cuisine: French
Ingredients: 1 cup flour; 1 cup water; 8 tablespoons unsalted butter; 1/2 teaspoon salt; 4 eggs; 2 1/4 cups whole milk; 1/4 cup corn starch; 1/4 cup sugar; 4 egg yolks; 1 vanilla bean (split in half and seeds removed); Pinch salt; 1 cup sugar; 1/4 cup unsalted butter (4Tb, cut into pieces); 1 teaspoon vanilla extract; 1/2 cup heavy cream; 1/2 teaspoon Flaky sea salt (+ more, for garnish)