In a small bowl whisk together the garlic powder, onion powder, paprika, cayenne and ¼ teaspoon of salt until combined then season the chicken thighs on all sides.
Cook the chicken
Heat a sauté pan or cast iron skillet over medium heat, add the olive oil and heat through. Sauté the chicken until cooked through, about 8 min. Remove to a cutting board and let cook then chop the chicken.
Make the onion salsa
In a medium bowl stir together the onion, cilantro and jalapeno. Season with lime juice and remaining salt.
Warm the tortillas
Heat a large skillet or griddle over medium heat and top two mini tortillas on top of each other then warm the tortillas on both sides. Repeat with remaining tortillas.
Assemble the tacos
To serve: Top the warmed tortillas with a spoonful of the chicken and the onion mixture. Serve with extra lime wedges on the side.