Tender, juicy beef and bell peppers coated in a rich, nutty, savory satay sauce. This easy Chinese-style satay beef recipe is made from scratch in just 30 minutes! I marinate the thinly sliced beef with baking soda to make it extra tender, just like Chinese takeout.
Optional: Freeze the beef uncovered for 45-60 minutes until slightly firm for easier thin slicing.
Slice the flank steak against the grain at a 45-degree angle into 1⁄4-inch-thick, 2-inch-long pieces. Transfer to a large bowl.
Add the beef marinade ingredients and mix well until evenly coated. Marinate for 15 minutes while preparing the remaining ingredients.
Add all the homemade satay sauce ingredients to a blender or food processor. Blend until well combined, scraping down the sides as needed. Set aside.
Heat vegetable oil in a large pan over medium-high heat. Add the marinated beef and spread it into an even layer. Cook for about 3-4 minutes, flipping halfway through, until lightly browned on the outside but still slightly pink inside.
Add the chopped bell peppers and stir-fry for 2 minutes until slightly softened but still crisp.
Add the blended satay paste and stir-fry for 1-2 minutes until the beef is cooked through and evenly coated in the sauce. Serve immediately.
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