Triple Cheese Spinach Tarts

Name: Triple Cheese Spinach Tarts
Ingredients: 10 tablespoons unsalted butter; 1 1/2 cup all-purpose flour; 1 teaspoon sugar; 1/2 teaspoon salt; 1-3 tablespoon ice cold water; 1 1/2 teaspoon olive oil; 6 cloves garlic, peeled, finely chopped and divided; 2 packages (9 ounces each) spinach leaves; 6 ounces cream cheese, softened; 1/3 cup grated pecorino romano cheese; 2 tablespoons freshly chopped chives; 1/2 teaspoon freshly ground pepper; 1/2 teaspoon kosher salt; 1 egg white; 2 teaspoons water; 2 ounces extra sharp cheddar cheese, grated