01 -
Warm olive oil in a deep-sided skillet over medium-high heat until shimmering.
02 -
Add ground beef to the skillet and cook, breaking it apart, until browned and fully cooked. Drain excess fat.
03 -
Stir in fire-roasted diced tomatoes with green chilies and taco seasoning; mix to combine thoroughly.
04 -
Add tomato paste to the beef mixture and stir until evenly distributed.
05 -
Pour in the water and bring mixture to a boil.
06 -
Break the dry spaghetti noodles in half and add to the skillet, ensuring pasta is submerged.
07 -
Reduce heat to medium-low, cover, and simmer for 12 to 15 minutes, stirring occasionally, until pasta is tender and sauce is thickened.
08 -
Carefully pour off any excess liquid as needed.
09 -
Sprinkle taco blend cheese over the mixture, cover, and let stand for 2 to 3 minutes until cheese is melted.
10 -
Top with chopped fresh tomato and sliced green onion before serving.