Recipe: Italian Stuffed Shells

box jumbo shells

(approximate) sweet Italian sausage, casings removed

medium red onion, finely chopped

frozen spinach, thawed and drained

fresh ricotta

egg

freshly grated parmesan

garlic

Large can of tomatoes, roughly chopped

tomato concentrate

vodka

dried red pepper flakes

fresh basil

mascarpone

mozzarella cheese, shredded