Heat a large skillet over high heat. Add 2 tablespoons olive oil and swirl to coat. When smoking, add meatballs. Sear, flipping halfway through and only when meatballs release from skillet, about 2 minutes per side.
Add linguine, chicken broth, and marinara. Bring to a boil and cook, stirring constantly, for 7-8 minutes, until noodles are al dente. Drizzle skillet with olive oil and serve immediately, garnished with basil and parmesan. Optional: top with slices of mozzarella and transfer to broiler until cheese is bubbling and golden in spots, about 3-4 minutes.