Preheat oven to 375F (190C) and lightly grease the sides and bottom of an 8×8 glass or ceramic baking dish with butter. Set aside.

In a large mixing bowl, combine peaches, sugar, lemon juice, vanilla, flour, cinnamon and salt and toss together until well combined.

In a separate large mixing bowl, whisk together flour, oats, brown sugar, baking soda, table salt, and cinnamon.

Use a pastry cutter to cut the butter into the oat mixture until it begins to clump together.

Assemble & BakeGive the peach mixture one more stir then pour it evenly into prepared baking dish. Scatter crumble topping evenly over the peach mixture.

Transfer baking dish to center rack of preheated oven and bake for 28-33 minutes or until peach mixture is bubbling and topping is golden brown. Peaches should be tender if pierced with a paring knife or fork.

Allow to cool at least 10-15 minutes before serving warm, preferably topped with vanilla ice cream!