01 -
Prepare medium pasta shells according to package instructions in a large pot of generously salted boiling water until al dente. Drain thoroughly and set aside.
02 -
Heat olive oil in a large skillet over medium-high heat. Add ground beef and cook until browned, about 3-5 minutes, breaking it apart with a wooden spoon. Drain excess fat, reserving 1-2 tablespoons for flavor. Transfer beef to a plate.
03 -
In the same skillet, add diced onion and sauté for 2 minutes until translucent. Add minced garlic and cook until fragrant, about 1 minute, stirring constantly to prevent burning.
04 -
Sprinkle flour over the aromatics and whisk continuously until lightly browned, about 1 minute, to create a roux base for the sauce.
05 -
Gradually whisk in beef stock, ensuring no lumps remain. Add marinara sauce, Italian seasoning, dried parsley, oregano, and smoked paprika. Stir to combine thoroughly.
06 -
Bring mixture to a gentle boil, then reduce heat and simmer, stirring occasionally, until sauce thickens slightly, about 6-8 minutes.
07 -
Reintroduce the cooked pasta and browned beef to the skillet, folding gently to coat with sauce.
08 -
Pour in heavy cream and stir until heated through, about 1-2 minutes. Season with salt and pepper to taste.
09 -
Incorporate sour cream into the mixture, stirring until fully integrated.
10 -
Fold in freshly grated cheddar cheese and stir gently until completely melted and incorporated, about 1-2 minutes.
11 -
Serve immediately while hot, garnished with fresh parsley if desired.