Preheat oven to 350ºF and spray 6, 4 ounce ramekins or one 8×8-inch baking dish with coconut oil and set aside.
Toast the almond flour by cooking it in a pan over medium high heat, stirring constantly for about 5 minutes, or until it smells nutty and is lightly golden. Set aside to cool.
To the now empty pan, add the butter and squash. Cook until tender, about 10 minutes. Add the vinegar, tea, allulose, and cinnamon. Cook until the squash is completely tender and the sauce reduces to a thick glossy consistency, about 15-20 minutes. Add the glucomannn and simmer for another 5 minutes, or substantially thickened. Season to taste with more sweetener and/or vinegar, as desired. It should taste sweet and tart. The squash should be soft.
In another bowl, combine almond flour, zest, sweetener, cinnamon, salt, vanilla, and butter and combine well until crumbly.
Place ramekins on a baking sheet and distribute the apples evenly among them. Top with the crumble.
Bake at 350ºF for 20-25 minutes, or until barely golden brown. Let cool for 5-10 minutes before serving.