A quick and easy weeknight dinner, stir-fried satay beef (sometimes spelled sate beef) uses simple but flavorful ingredients you have in your cupboard.
In a small bowl, whisk together the water, peanut butter, rice wine, soy sauce, curry powder, garlic, sugar, and chili sambal. Set aside.
Stir Fry
Trim all fat from the tenderloin. Cut the meat into 1/4-inch (5mm) slices. Place the meat in a medium bowl and toss with the water, oil, soy sauce, cornstarch, and pepper. Let stand at room temperature for 20 minutes.
Heat oil in a wok over medium-high heat. Add the beef, separating each piece as it goes into the wok. Brown on both sides, stirring often, for 3 to 4 minutes. Remove the beef from the pan.
Add the onions to the wok and cook, stirring often, until soft and translucent, about 5 minutes. Stir in the reserved satay sauce and bring to a boil. Return the beef to the pan and toss to combine and heat through, this takes about 1 minute. Serve immediately over cooked rice.