Stuffed shells

I hate wasting food, so I'm always looking for ways to use up leftovers. On Mother's Day I grilled some yummy pizzas. One was shrimp, sweet corn and roasted red pepper, and the other was mushroom, spinach and red onion. They were very good, the problem was that I had veggies leftover because I had to buy a big bag of spinach and a whole package of mushrooms, but I only needed a handful of each for my pizza. I started thinking how I could use the leftovers and decided to incorporate them into the stuffed shells I was making for dinner last night. Here's my "recipe":

1/4 large onion
1 clove garlic
handful of spinach
handful of mushrooms
1/2 roasted red pepper
palmful of Parmesan cheese
handful of mozzarella cheese, plus more for topping
pinch of black pepper
1/2 lb ricotta cheese
salt to taste
1 egg
12 large shells, cooked al dente
marinara sauce

Throw veggies in food processor and chop until small. Mix in cheeses and beaten egg. Spoon filling into shells. Spoon marinara into the bottom of a baking dish. Place shells in dish. Spoon more marinara on top of shells. Top with mozzarella. Bake at 375 degrees for 25-30 minutes or until sauce bubbles.

DISCLAIMER: If you are thrown off by my obscure measurements or undetailed recipe, then you probably shouldn't try making this dish and should just order a pizza.

Enjoy!