In a bowl, combine 1/4 cup boiling water with 1 tablespoon Beef Better Than Bouillon and 2 tablespoons brown sugar. Stir until both are fully dissolved, then mix in 3 tablespoons soy sauce. Set this sauce mixture aside for later use.

Slice the beef into very thin strips. Cut the carrots and broccoli into approximately two-inch pieces. Chop the onion and press or mince the garlic cloves so they’re ready for cooking.

Heat a skillet over high heat and add a splash of sesame oil (you can add a bit of olive oil if you like a milder flavor). Add the sliced beef and cook, stirring frequently, until golden brown. Remove the cooked beef from the skillet and set it aside.

Using the same skillet, add a bit more sesame oil if needed. Sauté the chopped onions until they turn golden brown, then remove and set aside. Next, add the carrots and cook until slightly softened. Add the broccoli and sauté for about three minutes until just crisp-tender, then press the garlic into the mixture and stir well. I like to use fresh garlic here because it really brightens up the whole dish.

Return the cooked beef (from Step 3) and the golden onions (from Step 4) to the skillet with the vegetables. Pour the prepared sauce (from Step 1) over the mixture and let everything simmer together for about 2 minutes so the flavors combine.

Add the cooked lo mein noodles to the skillet. Toss everything together until the noodles are well combined with the beef, vegetables, and sauce. Drizzle in 1 teaspoon of sesame oil for extra flavor. I always like to finish with a splash of sesame oil because it gives a wonderful aroma and authentic taste.

Transfer the finished stir-fry into a large serving dish. Toss well to combine all the ingredients evenly. Serve hot and enjoy your homemade beef lo mein!