Creamy Garlic Chicken(A five star meal in ten minutes)

For the Chicken
Chicken breasts 400g
Salt and pepper to taste
Cake or AP flour 25g
For the Sauce
5 cloves of garlic 25g
Unsalted butter or olive oil 20g + 15g
Chicken/vegetable broth or water 100g
Lemon juice, optional 5mL
Heavy cream or milk 250g
Salt 2g
Chili powder or crushed red pepper 2g
Fresh herb 10g
Pepper to taste
Cornstarch Mixture(optional)
Cornstarch 5g
Hot water 15mL