Spinach and Goat Cheese Tartlets

Name: Spinach and Goat Cheese Tartlets
Ingredients: 4 tablespoons unsalted butter; 3 sheets frozen phyllo dough, thawed; 2 tablespoons grated parmesan cheese; Vegetable oil, for brushing; 1 large shallot, minced; 1 clove garlic, minced; 1 teaspoon all-purpose flour; 1/4 cup milk; Pinch of freshly grated nutmeg; Kosher salt and freshly ground pepper; 3 1/2 ounces mild goat cheese, softened; 2 teaspoons finely grated lemon zest; 1 tablespoon white wine vinegar; 2 large eggs, separated; 1 10-ounce box frozen chopped spinach, thawed and squeezed dry; Chopped chives, for garnish