Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.

In a food processor, combine the red onion and bell pepper, pulse until finely minced, then drain excess moisture.

In a mixing bowl, combine minced onion and bell pepper with ground chicken, minced garlic, paprika, oregano, cumin, crushed red pepper flakes, salt, and tomato paste; mix well.

Trim the tortillas into rectangles, spread the chicken mixture evenly, stack and cut into strips; skewer the strips with wooden skewers and arrange them on the baking sheet.

Bake the kebabs in the preheated oven for 15 minutes.

In a small saucepan, melt butter over low heat, stir in minced garlic and chopped parsley to create the garlic parsley butter.

Remove the kebabs after 15 minutes, brush them generously with garlic butter, and return to the oven.

Bake for an additional 20 minutes or until golden brown.

Carefully remove skewers and serve with tzatziki sauce or fresh salad.