PREHEAT oven to 425°F. COMBINE goat cheese, 1 tbsp. parsley, chives, dill, garlic and lemon zest until smooth and spreadable.
PLACE pastry on lightly floured surface. ROLL into 9-inch square. CUT into 4 even portions. SCORE 1/2-inch border on all sides of pastry squares with sharp knife. PRICK pastry all over inside score lines with fork. PLACE on large parchment paper–lined baking sheet. TRANSFER to freezer for 5 minutes.
BEAT 1 egg with 1 tbsp. water; set aside. SPREAD goat cheese mixture evenly inside score lines of each pastry square. BRUSH border of each pastry with egg wash.
BAKE for 12 to 15 minutes or until pastry is lightly golden. REMOVE baking sheet from oven. CRACK egg into center of each pastry. TOP evenly with tomato slices. RETURN to oven; bake for 8 to 10 minutes or until whites are set and eggs are cooked to desired doneness. SEASON with salt and pepper. GARNISH with remaining parsley.
Substitute tarragon or basil for dill if desired.
Alternatively, use store-bought herbed goat cheese or your favorite flavored goat cheese for a quick substitution.
To ensure food safety, eggs should be cooked until both the yolk and the white are firm. Consuming raw or undercooked eggs may increase your risk of foodborne illness, especially for those with certain medical conditions. For recipes that call for eggs that are raw or undercooked when the dish is served, use either pasteurized shell eggs that have been treated to destroy Salmonella, or use pasteurized egg products.