Boil a large pot of salted water, add half the box of pasta + cook 10-12 min or until al dente, then drain + return to pot

Meanwhile, dice onion; heat 2 tbsp oil in skillet over med; add onions + container of tomatoes + saute 6-8 min until tomatoes burst; season with ½ of seasoning packet + salt/pep

Add tomato sauce to blender; puree with ¼-½ cup water until smooth; taste + season with salt/pep

Toss pasta with fresh tomato sauce; divide pasta to plates then sprinkle 1-2 tbsp cheese to each plate