
Preheat oven to 350º.
Melt 1 tablespoon butter in small cast-iron skillet over medium heat. Add sliced fruit and sauté about 3 minutes, until softening. Add agave nectar and salt, taste, correct seasonings, and continue to sauté about 3 more minutes. You don't want the fruit to become totally soft but you want to get a little softening in.
Meanwhile, mix together all crumble topping ingredients except the butter. Cut in 2 tablespoons butter using two knives or a pastry blender or until resembles a coarse meal. Spread crumble topping over fruit in skillet.
Melt remaining tablespoon of butter and brush top of crumble with melted butter. Bake for about 15-18 minutes. Remove from oven and let cool slightly before serving with ice cream.