Preheat the oven to 325℉.
Check your ricotta to see the water content. It is a good practice to drain it before use, especially on applications like this, as it will bring moisture that could render your dish wet.
Sauté the spinach and let it cool completely. Add a small amount of olive oil to the pan. Once hot, add as much spinach as possible, the whole bag if possible. The spinach will wilt quickly, so do not leave the pan alone for too long. For added flavor, add thinly sliced garlic to the oil.
Mix ricotta, mozzarella and pecorino romano. Season to taste with salt and pepper. Add a couple of scrapes of lemon zest for an added pop of freshness to the mixture.
Cook your pasta. I cooked the pasta under al dente only because the pasta will bake in the oven for another 20 minutes in sauce and cheese. Once the pasta is cooled, drain the water and make sure the pasta has no water pockets inside.
Once the spinach has cooled down, chop it to a mince. Add the spinach to the ricotta cheese mixture and fold. You want to distribute the spinach throughout the mixture. Add egg if mixture is too moist
Tomato confit is tomatoes cooked with garlic, shallots, and thyme in olive oil until soft. However, this recipe pairs perfectly with a hearty tomato sauce or bolognese.
Pour confit or Tomato sauce on the bottom of a baking dish. I used my brownie pan. You want t a thin layer, and reserve some sauce or confit for drizzling over the top of the pasta shells.
Use a spoon to fill the centers of the pasta shells. Arrange the shells in the pan and top them with a thin layer of sauce.
Bake in a preheated oven at 325℉ for 20 minutes covered with aluminum foil and then for 10 minutes uncovered until the shells are golden and the cheese is gooey. Serve six shells per person.