Combine cheeses, honey, 1/2 teaspoon lemon juice, and nutmeg, stirring well. Stir in walnuts. Chill 1 hour.
Sprinkle cut sides of apricots evenly with 1 tablespoon lemon juice.
Spoon about 1 teaspoon cheese mixture into each apricot half; chill 1 hour. Garnish with chopped mint, if desired.