2 tbsp. extra-virgin olive oil
2 (8-oz.) boneless, skinless chicken breasts, cut into 1" pieces
Kosher salt
4 garlic cloves, finely chopped
1/4 tsp. crushed red pepper flakes
1 3/4 c. water
3/4 c. heavy cream
8 oz. penne
1 oz. Parmesan, finely grated (about 1/2 cup)
2/3 c. store-bought or homemade pesto
Fresh basil, for serving (optional)