Peach crisp - chinese grandma

Ingredients

• 6 cups fresh peaches or nectarines, sliced (about 6 large)
• 1/2 cup sugar (you can cut to 1/4 cup if your peaches are super sweet)
• 2 teaspoons lemon juice
• Sprinkle of nutmeg (or cinnamon/ginger/cloves or combination)
• 1 cup all-purpose flour
• 1/2 cup granulated sugar
• 1 stick (1/2 cup) butter, cold
• 1/2 teaspoon salt (omit if using salted butter)
• 1/4 cup chopped nuts (optional)