Warm the pot. Set a large, deep skillet or Dutch oven over medium heat.
Add olive oil and let it warm until shimmering.
Brown the protein. Add the ground turkey. Cook, breaking it into small crumbles, until no longer pink, about 5–6 minutes. Sprinkle with a pinch of salt and pepper as it cooks.
Soften the aromatics. Stir in the onion and bell pepper.
Cook until the onion is translucent and the pepper softens, 3–4 minutes. Add the garlic and cook 30 seconds, until fragrant.
Build the base. Stir in the tomato paste and taco seasoning. Cook 1 minute to toast the spices.
This deepens the flavor and prevents a raw tomato taste.
Add liquids and pantry staples. Pour in the diced tomatoes with juices, green chiles, broth, black beans, and corn. Stir to combine. Taste the liquid and adjust seasoning with salt and pepper if needed.
Add the pasta. Stir in the dry pasta, pressing it into the liquid.
Bring to a steady simmer, not a rapid boil.
Simmer and stir. Cover partially and cook, stirring every 2–3 minutes to keep the pasta from sticking. Simmer 10–12 minutes, or until the pasta is al dente and much of the liquid has been absorbed. If it gets too thick before the pasta is tender, add a splash of broth or water.
Creamy finish. Reduce the heat to low.
Stir in the Greek yogurt (or light cream cheese) until smooth and creamy. If using cheese, sprinkle it in and stir until melted. Squeeze in the lime juice for brightness.
Rest and garnish. Let the pasta sit off the heat for 2–3 minutes to thicken.
Top with cilantro and any optional toppings. Serve warm.