To make lemon butter sauce, take a small saucepan and melt butter over medium to low heat.
Allow the butter to cook in the saucepan without burning it. Keep swirling the pan to ensure the butter doesn't burn as that can easily happen within seconds if left unattended.
Now as the butter turns to a golden brown color and starts to give out a nutty aroma, keep swirling the saucepan for the next 5 minutes or so.
Once that happens, add the minced shallots and garlic. Allow them to cook in the butter until they begin to turn golden brown.
Once that happens, take the pan down the heat and quickly stir in the herbs ( in this case, finely chopped thyme and parsley sprigs), lemon juice, and salt and pepper as per taste.
If you want the sauce to be thicker, add 1/2 a cup of fresh cream into it. This will make the sauce thicker and creamier. After it's made, you can serve it over pasta, salmon, or sauteed vegetables to dramatically enhance their flavor.