01 -
Turn your oven up to 220°C and set one rack in the middle.
02 -
Bake your bread slice until crisp and golden, dunk in water until soft as it gets, squeeze out the water, then rip into bits.
03 -
Toss bread bits, beef, lamb (if using), onion, garlic, parsley, cumin, coriander, both peppers, salt, and black pepper into a big bowl. Crack in the egg. Gently mash everything together by hand until just mixed.
04 -
Grab a rimmed baking tray, line it with parchment, and form about 18 to 20 meatballs (roughly 2 tablespoons per ball). Spread them out on the sheet.
05 -
Pop those meatballs into the oven (middle rack) and bake until they're cooked through—no pink left—should take around 15 to 20 minutes.
06 -
Stir water and cornstarch together in a small bowl till smooth. Add the egg and Greek yogurt, sprinkle in salt and pepper, and whisk until it all comes together.
07 -
Heat up the broth in a small pot until it's bubbling, then turn down to a light simmer. Gradually whisk in the yogurt mix, keep whisking until it thickens up, about a minute. Take off the heat and keep warm.
08 -
Pour the olive oil into a small skillet, heat gently, and add Aleppo flakes. Swirl until the oil’s got a deep reddish hue, then pull off the heat.
09 -
Put meatballs in shallow bowls, spoon warm yogurt sauce over them, toss on pickled onions if you like, and finish with a drizzle of the chili oil.