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. Add the ground turkey. Break it up with a spatula and spread it out to brown. Cook for 6 to 8 minutes, stirring occasionally, until no pink remains.

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

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

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