Step 1: Cook the Pasta : Bring a large pot of salted water to a boil. Cook penne pasta until al dente according to package directions. Reserve ½ cup of pasta cooking water, then drain pasta.

Step 2: Cook the Chicken : In a large skillet, heat 2 tbsp olive oil over medium-high heat. Add chicken pieces, season with salt and pepper, and sauté for 6–8 minutes until golden brown and cooked through. Add garlic in the last minute of cooking.

Step 3: Toss with Pesto and Pasta : Add drained pasta to the skillet with chicken. Stir in ½ cup basil pesto and a splash of pasta water to loosen the sauce.

Step 4: Add Mix-Ins : Stir in cherry tomatoes and mozzarella cheese. Toss until mozzarella begins to melt slightly and tomatoes soften.

Step 5: Finish u0026 Serve : Sprinkle with Parmesan (if using).Garnish with fresh basil. Serve warm.