"We <3 the lemony ricotta filling...."
(8-oz.) package manicotti
extra-virgin olive oil
yellow onion, chopped
cloves garlic, minced
tomato paste
(28-oz.) can crushed tomatoes
ricotta cheese
shredded mozzarella
freshly grated Parmesan
freshly chopped basil, plus more for garnish
Zest of 1/2 lemon
Kosher salt
Freshly ground black pepper