1/4 cup all-purpose flour |
1/4 cup unsalted butter |
1/4 cup rolled oats |
3/4 cup packed light brown sugar |
1/2 cup chopped pecans or walnuts |
3/4 teaspoon ground cinnamon |
1/2 teaspoon freshly grated nutmeg |
1 1/2 pounds blackberries and loganberries (any other berries will do) |
1/2 pound peeled, thinly sliced nectarines |
1/4 teaspoon ground ginger, or to taste |
1/3 cup sugar, or to taste |
2 teaspoons cornstarch |