Cook the Capellini: Bring a large pot of salted water to a boil. Add the capellini pasta and cook according to the package instructions (usually 2-3 minutes). Drain and set aside, reserving a little pasta water.
Prepare the Garlic and Olive Oil: While the pasta is cooking, heat the olive oil in a large skillet over medium heat. Add the minced garlic and cook for about 1 minute, stirring constantly, until fragrant but not browned.
Sauté the Cherry Tomatoes: Add the halved cherry tomatoes to the skillet and cook for 2-3 minutes, just until they begin to soften. Season with salt, pepper, and optional red pepper flakes.
Combine the Pasta and Sauce: Add the cooked capellini to the skillet with the garlic and tomato mixture. Toss everything together, adding a bit of the reserved pasta water to help coat the pasta evenly with the sauce.
Garnish and Serve: Once everything is well combined, garnish with freshly chopped basil and a sprinkle of grated Parmesan cheese (if desired). Serve immediately.
