Hello Claire. When you are working with limited time and want to preserve the fresh, delicate flavors of your home garden herbs and vegetables, you have some wonderful and reliable options that work in thirty minutes or less.
First, the most effective physical technique is slicing the beef very thinly against the grain. Look closely at the meat to identify the direction in which the muscle fibers run, and cut perpendicularly across those lines. This immediately shortens the tough fibers, making every bite significantly more tender regardless of how tough the cut was initially. You can also lightly pound the slices or cutlets with a textured meat mallet or rolling pin to break down the connective tissue further.
Second, for a chemical method that does not leave a strong lingering taste, I highly recommend velveting with baking soda. For one pound of sliced beef, toss the meat with about three-quarters of a teaspoon of baking soda and a tablespoon of water so it coats evenly. Let it rest at room temperature for fifteen to twenty minutes. Baking soda raises the pH level on the meat surface, which prevents the proteins from contracting tightly and squeezing out moisture when heated. After fifteen to twenty minutes, rinse the beef thoroughly under cold running water in a colander and pat it completely dry with paper towels. Rinsing removes the alkaline taste entirely, leaving your beef exceptionally tender and ready to absorb the natural flavors of your garden herbs.
Finally, if you prefer not to use baking soda, a generous coating of salt (dry brining) for twenty to thirty minutes before cooking will begin breaking down surface muscle proteins and help the meat retain its natural juices during a quick, high-heat sear.
I hope this helps you prepare a wonderful dinner tonight. Let me know if you have any questions about the cooking process.