"Low-carb Cabbage Lasagna from Delish.com packs all of the flavor...."
large head cabbage, leaves separated
extra-virgin olive oil, plus more for baking dish
onion, chopped
cloves garlic, minced
ground beef
(28-oz.) can crushed tomatoes
balsamic vinegar
torn basil leaves
Kosher salt
Freshly ground black pepper
ricotta
eggs, beaten
grated Parmesan, plus more for serving
shredded mozzarella