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Preheat oven to 400 degrees.
Fruit filling:
Roughly 2 pts. total fruit - I used 1.5 C frozen blueberries, 1/2 C fresh raspberries, and 5 small Colorado peaches (peeled and sliced)
1/4 c. granulated sugar
2 tbsp. cornstarch
pinch of grated nutmeg
Toss all ingredients together in a large bowl, and place in a buttered or sprayed 9x9 inch baking dish, or one of similar capacity.
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Topping:
1 c. whole wheat pastry flour
1/2 c. brown sugar
1/2 c. rolled oats
3/4 tsp. cinnamon
pinch of salt
1/2 c. walnuts, pecans, or almonds, chopped
1 stick softened butter, cut into slices (for easier incorporating)
Mix together the dry ingredients, including the nuts, and then work in the butter with a pastry blender or a fork.
Sprinkle half of the topping evenly over the fruit and cook for 10 minutes. Add the rest of the topping and cook for another 15 minutes, until top is crisp and brown and juices start to bubble up around the edges.
Serve warm with a scoop of ice cream!