Marinate the meat with salt, pepper, and desired spices for 30 minutes.
Heat a grill or skillet over medium-high heat.
Cook the marinated meat for about 5-7 minutes on each side until fully cooked.
Remove the meat from heat and let it rest for a few minutes.
Warm the corn tortillas on the grill for about 30 seconds on each side.
Dice the cooked meat into small pieces.
Assemble the tacos by placing some meat on each tortilla.
Add diced onions, tomatoes, and cilantro on top of the meat.
Squeeze fresh lime juice over the tacos for added flavor.
Serve with salsa or hot sauce on the side.