Name: Air Fryer Mongolian Beef Strips
Prep time: 15 min
Cook time: 12 min
Total time: 27 min
Ingredients: 1 lb flank steak (partially frozen for 20 minutes before slicing, then sliced thin against the grain); 3 cups broccoli florets (cut into roughly equal bite-size pieces); 3 tbsp soy sauce (low-sodium preferred); 2 tbsp oyster sauce; 3 cloves garlic (minced); 1 tsp fresh ginger (grated or finely minced); 1 tbsp cornstarch (helps the sauce cling and caramelize); 1 tsp sesame oil (added after cooking for flavor); 1 tsp brown sugar (optional, balances the saltiness); 2 cups cooked white rice (for serving)

From the roundup: 22 Air Fryer Dinner Recipes for Busy Nights

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Air fryer Mongolian beef strips have become my go-to on the nights when I open the fridge at 5:30, see a pound of flank steak, and need dinner on the table before anyone starts complaining. The whole thing, including the 20-minute freezer step that makes slicing actually manageable, runs about 27 minutes start to finish.

The sauce is soy, oyster sauce, garlic, ginger, and a little cornstarch, nothing you have to run to the store for. It clings to the beef and broccoli as everything cooks at high heat, and the edges pick up a slight char that you almost never get from a skillet at home. Serve it over white rice with any sauce that pooled in the basket spooned right back over the top.

Active time is maybe 10 minutes: slicing the beef, whisking the sauce, and tossing everything together. The air fryer does the rest, and you get one bowl to wash.

How this ended up in the rotation

I started making this after a Tuesday where I had genuinely planned to order takeout and then realized I had everything I needed already. My husband is the one who noticed that the air fryer was getting the beef edges charred in a way my wok never does, probably because I always overcrowd the pan. Now two of my five kids request this specifically, which in this house counts as a win.

The first time I made it I skipped the freezer step and tried to slice the steak straight from the fridge. The strips were uneven and some were almost a half inch thick, which meant they were still pale in the middle when the broccoli was already done. Twenty minutes in the freezer is worth it.

Why you will love this

Total time is 27 minutes, including the brief freezer step for the steak
The cornstarch in the sauce helps it caramelize against the hot air fryer basket instead of sliding off
Broccoli cooks right alongside the beef, so there is no second pan or separate steaming step
Flank steak at this thickness stays tender without any long marinating time
Leftovers reheat well in the air fryer and taste close to fresh

Tips for success

Do not skip the freezer step. Twenty minutes is enough to firm the steak so you can slice it to a consistent 1/4 inch. Thicker pieces will still be pale when everything else is done.
Spread the beef and broccoli as evenly as you can in the basket. Two layers deep is the limit. If you pile it higher, the bottom layer steams instead of browning and you lose the charred edges.
Toss everything with tongs at the halfway point. The broccoli on top browns fast at 390 degrees, and the beef underneath needs to rotate up to get color.
Check at 10 minutes before committing to 12. Air fryers vary and a thinner cut in a smaller basket can finish early. You want charred tips on the broccoli and no pink in the thickest beef pieces, not dried-out strips.

If the beef looks pale or watery

Pale beef usually means the basket was too full. Pull some pieces out, cook in two batches, and combine at the end.
If there is liquid pooling in the basket at the halfway toss, that is the sauce releasing moisture. Keep going, it will tighten up in the second half of cooking.
Watery sauce at the end can also mean the cornstarch did not fully coat the beef before it went in. Next time toss and let it sit the full 5 minutes before air frying.
If the broccoli is burning before the beef is done, your florets are probably smaller than the beef strips. Cut the broccoli a little larger next time so everything finishes at the same rate.

Substitutions

Flank steak can be swapped for skirt steak or a thin-cut sirloin, both work at the same thickness. Oyster sauce can be replaced with hoisin for a slightly sweeter result, or you can leave it out and add an extra teaspoon of soy sauce instead. For a gluten-free version, use tamari in place of the soy sauce and double-check that your oyster sauce is certified gluten-free, since many brands are not.

If you have a picky eater who will not touch broccoli, swap it for thin-sliced bell pepper or snap peas cut in half. They cook at roughly the same rate and hold up to the high heat without turning soft.

Make-ahead and storage

You can slice the beef and whisk the sauce up to a day ahead. Keep them in separate containers in the refrigerator and combine them right before air frying. Do not toss the beef in the sauce more than 30 minutes early or the cornstarch starts to get gummy before it hits the heat.

Leftovers keep in an airtight container in the refrigerator for up to 3 days. Reheat in the air fryer at 350 degrees F for 3 to 4 minutes, or in a skillet over medium heat with a small splash of water to loosen the sauce. Freezing is not recommended because the broccoli turns soft after thawing and the texture of the beef changes noticeably.

Brittany Stage