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Preheat oven to 375ºF. Grease a 9-inch pie pan and set aside.
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In a large bowl, combine almond flour and salt. Then add in remaining ingredients and mix into a shaggy ball. Press the dough into the bottom and sides of the 9-inch pie pan. Bake for 15 minutes or until lightly browned. Cool.
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Meanwhile, make the filling. Heat a large sauté pan over medium heat and heat olive oil. Add shallots and sauté for 5-7 minutes until translucent. Add spinach and sauté just until slightly wilted, about 30 seconds. Transfer to a plate to cool.
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In a large mixing bowl, whisk together eggs, milk, salt and red pepper flakes. Stir in the cooled spinach mixture and goat cheese.
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Pour the mixture in the crust and bake for 35 minutes or until the quiche is firm and just barely jiggles.
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Serve warm or at room temperature.