Preheat and prep: Heat your oven to 375°F (190°C). Lightly coat a 9x13-inch baking dish with cooking spray.
Cook the pasta: Bring a large pot of salted water to a boil.
Add the high-protein pasta and cook until just shy of al dente (about 1–2 minutes less than the package suggests). Drain and set aside.
Sauté aromatics: In a large skillet, heat olive oil over medium heat. Add onion and cook until translucent, 4–5 minutes.
Stir in garlic and cook 30 seconds until fragrant.
Brown the beef: Add ground beef, salt, and pepper. Cook, breaking it up, until no longer pink and most moisture evaporates, 6–8 minutes. If excess fat remains, drain briefly.
Season it up: Stir in smoked paprika, onion powder, and Worcestershire sauce.
Cook 1 minute to bloom the spices.
Build the sauce: Pour in beef broth, tomato sauce, ketchup, and mustard. Stir and let it bubble 3–4 minutes until slightly thickened. Taste and adjust salt and pepper.
Add creaminess: Reduce heat to low and whisk in Greek yogurt until smooth.
Do not boil after adding to prevent curdling.
Combine: Remove from heat. Fold in the cooked pasta, 1 cup of cheddar, mozzarella, and chopped dill pickles. The mixture should be saucy; if it looks dry, splash in a bit more broth.
Assemble: Transfer the mixture to the prepared baking dish.
Sprinkle the remaining 1/2 cup cheddar evenly over the top.
Bake: Place in the oven and bake 15–18 minutes, until the cheese is melted and the edges are bubbling.
Finish and serve: Let rest 5–10 minutes to set. Top with extra chopped pickles and green onions if desired. Serve warm.