Chop the vegetables. Add the onion, tomatoes, green pepper, parsley, and mint to a food processor and pulse until very finely chopped, almost a paste. You can also chop by hand, just get it as fine as possible.
Make the meat mixture. In a large bowl, combine the ground beef or lamb with the chopped vegetable mixture. Add the garlic, red pepper paste, tomato paste, red pepper, salt, and black pepper. Mix very well with your hands until fully combined and spreadable.
Prep your pans. Preheat your oven to 425°F. Line one or more cookie sheets with parchment paper.
Top the tortillas. Lay the uncooked tortillas flat on the baking sheets. Spread the meat mixture very thin across each tortilla, all the way to the edges, like frosting a cake. Don't overload it. Thin is everything.
Bake. Bake at 425°F for 15 to 17 minutes, until edges are golden and slightly crispy and the meat is fully cooked. You want a little char. That's not a mistake — that's the flavor.
Serve. Serve warm. Roll them up with fresh parsley, sliced raw onion, and a squeeze of lemon, or eat flat. A dollop of plain yogurt on the side is traditional and absolutely worth it.