Heat a large skillet over medium heat and add a splash of olive oil. Warm the oil until it shimmers.

Add the diced onion and bell pepper. Sauté for 4 to 5 minutes, until the vegetables soften and the onion turns translucent.

Push the vegetables to one side of the skillet and add the ground turkey. Break it up with a spatula and spread it out to brown. Cook 6 to 8 minutes, stirring occasionally, until cooked through and no longer pink.

Stir the vegetables and turkey together. Add the black beans, corn, and diced tomatoes. Sprinkle in the taco seasoning, then season with salt and pepper to taste.

Reduce the heat to low and let the mixture simmer for 5 to 10 minutes, stirring occasionally, until everything is heated through and the flavors meld.

Taste and adjust the seasoning as needed. Serve directly from the skillet, spoon into taco shells, or make bowls with rice or greens.