Add crumbled tofu, miso, olive oil, nutritional yeast, garlic, salt, pepper, and lemon juice to the bowl of a food processor or blender and blend until creamy, stopping to scrape down the sides as needed.
Add in spinach and blend until well combined.
Add salt and pepper to taste.
Set aside
Stuffed Shells
Preheat the oven to 375 degrees. Cook pasta until al dente according to package directions.
Spread about 1/2 of the sauce in the bottom of an 8 x8 or 9 x 9 baking dish.
Stuff shells with the spinach tofu ricotta mixture and place them in the baking dish.
Top with the remaining sauce and vegan mozzarella and bake for 20-30 minutes or until warmed through.
Serve immediately topped with basil and parsley, if desired.