Preheat the oven to 400 degrees F.
Add the quartered tomatoes, sliced onions, and garlic to a baking tray. Add salt, olive oil, pepper, dried basil and toss well. Bake in the tray or in a baking dish fir 40-45 minutes.
In the meantime, cook the gnocchi and set aside. Gnocchi should be done in 4-5 minutes. It rises to the top and floats when cooked.
Remove the tomatoes from the oven. Transfer to a bowl.
Mash the tomatoes gently. The juices from the tomatoes make the sauce.
Add the cooked, gnocchi, halved mozzarella balls, and quarter cup fresh basil. Sprinkle vegan Parmesan. Mix well and bake for 20-22 minutes or until the mixture is bubbly and the cheese melted.
Remove from the oven.
Garnish with the rest of chopped basil and pine nuts. Serve warm.