Warm the cream (or half and half) and grate the garlic.
Make the sauce:
Heat a large pan over medium heat and melt the butter. Add the garlic and sauté it for about a minute while stirring until fragrant. Add the herbs and stir to toast them.
Pour in the chicken broth (or stock) and the warmed cream (or half and half) into the pan. Stir and bring the liquid to a boil. Simmer the sauce for 5 minutes to reduce it and give it a thicker texture. It can be used as is or thickened further -it's a matter of preference.
To thicken the sauce, make a slurry in a small dish by mixing 1 tablespoon of cornstarch and 3 tablespoons of cold water. Add it to the sauce and simmer it for 5 minutes, then turn off the heat.
Serve:
Combine the sauce with chicken breasts, pour it over mashed potatoes, or toss it with cooked pasta.
Notes
Swap fresh garlic for 1 teaspoon of garlic powder.
Swap the Italian seasoning for 1 teaspoon oregano or ½ teaspoon of dried thyme.
Want to use fresh herbs? Finely mince the herbs and double the amount of dried.