Make dough: Whisk almond + coconut flour + salt. Stir in melted butter, egg and vinegar. Mix to a soft dough, adding 1 tbsp water if dry. Wrap and chill 20–30 minutes.
Cook filling: Heat oil, sauté onion & pepper 4–5 minutes. Add garlic 30 sec. Add beef, brown, drain excess if needed. Stir in tomato paste, spices, olives and vinegar; simmer 2 minutes. Cool slightly.
Roll & cut: Roll chilled dough on almond-flour-dusted surface to 1/8" thick. Cut 3½–4" discs.
Fill & seal: Place 1.5 tbsp filling on each disc, brush edge with egg, fold, and crimp with fork. Transfer to parchment-lined sheet.
Egg wash & bake: Brush with beaten egg. Bake at 375°F (190°C) for 16–20 minutes until golden. Or air-fry at 360°F (180°C) for 8–10 minutes.
Serve: Cool 5 minutes and serve with chimichurri, cilantro-lime crema or low-carb hot sauce.