Almond Crisp Peaches

4 ripe peaches
1/3 cup (55 grams) whole almonds
1/4 cup (50 grams) sugar
3 tablespoons (45 grams) cold unsalted butter, cubed
Optional extras: 1/4 cup (20 grams) rolled oats, 1/8 teaspoon ground cinnamon, pinch of sea salt
Heat oven to 350 degrees. Halve peaches and remove pits. Place fruit cut side up in baking dish. In a food processor, grind almonds and sugar together until coarsely ground (with a few pebbles left). Add oats and other flavorings, if using, then butter, pulsing the machine until the ingredients are just blended. Spoon the almond mixture into the center of each peach, then press it flat, as if icing the tops of the peaches with it. Bake for 45 minutes to 1 hour (baking time varies with peach size), until the top is brown and crisp and you can easily slice through the fruit with a fork or spoon.
Serve warm or at room temperature, with creme fraiche, lightly sweetened whipped cream or even plain yogurt, cold, for breakfast.