01 -
Warm your oven to 375°F and boil the pasta shells till they're firm but not crunchy according to box timing
02 -
Pour olive oil in a big pan, soften the chopped onion for about 3-4 minutes, then throw in chopped garlic and cook another minute
03 -
Toss spinach into your pan and let it shrink down for around 2 minutes
04 -
Mix your cooked veggies with all the cheeses, the egg, salt, and pepper in a big bowl
05 -
Pour about half your tomato sauce into the bottom of an 8x8 or 9x9 dish
06 -
Pack each shell with your cheese-spinach mix and line them up in your sauce-coated dish
07 -
Pour the rest of the sauce on top and stick in the oven for 20-30 minutes till everything's hot
08 -
Sprinkle with fresh basil and extra Parmesan if you like, and eat while it's hot