In a blender, combine 1/2 mango for the sauce and 1-2 tablespoon water. Blend on high until smooth. Add all other ingredients for the sauce into the blender and blend until smooth, adding water slowly to get desired thickness. I like mine pretty thick.: The air in the blender becomes fragrant as the ripe mango purees, releasing a fresh, tropical aroma. You will notice the mixture transitioning from fibrous pieces to a silky, glossy sauce, which is the cue that the blades have done their job. The texture matters because a lumpy sauce will cling unevenly to the chicken and broccoli , so aim for perfectly smooth. If the sauce seems too thick, add water a teaspoon at a time until it moves like a thick ribbon. Common mistake, and one I always warn against, is adding too much water at once, which can dilute flavor and require more seasoning to correct. Keep tasting and adjust salt or sweetness slowly.
Heat 1 tablespoon desired cooking oil over medium-high heat in skillet.: As the oil warms it will shimmer and give off a faint aroma, signaling readiness. You want the pan hot enough that a piece of chicken sizzles on contact, creating immediate searing sound and efficient browning. This initial heat locks in juices, so resist lowering the temperature until the meat has had a chance to color. A typical pitfall is overcrowding the skillet, which drops the temperature and prevents that desirable sear, leading to steamed rather than browned protein.
Add in chicken and cook, stirring frequently until cooked through and there is no pink.: The skillet will sing with steady sizzles as the chicken cooks, and you should see edges turn golden while centers remain juicy. Stirring frequently encourages even cooking and prevents uneven charring. Test a piece by cutting into it; the interior should be opaque all the way through. Overcooking dries the meat quickly, so pull it from the heat as soon as it is done. One common error is assuming that color alone equals doneness, so always check the center.
Remove chicken from skillet and set aside for later.: Removing the chicken lets the pan regain high heat for the vegetables without overcooking the meat. The plate that holds the cooked pieces will still carry warmth, which helps keep everything hot when you return the protein to the skillet. Leaving the meat in the pan risks it continuing to cook and becoming tough, so make space for the next stage.
Add more oil if needed, and add onion. Cook until translucent.: When the onion hits the hot oil it should begin to soften and release a sweet, savory scent. You will see the color go from stark purple to a softened hue and the slices become slightly glossy. Cook just until translucent to preserve a little bite and brightness. Avoid caramelizing unless you want sweeter notes, because a long brown color will shift the flavor profile away from the fresh balance we are aiming for.
Add in broccoli and cook until tender.: The broccoli will sizzle and steam, and you should watch for a vivid green and slightly crisp stalks. Tender does not mean mushy; aim for a fork that meets gentle resistance. Too much time will leach color and reduce that pleasant crunch. A frequent oversight is adding cold, wet produce straight from the fridge, which can create excess steam and slow browning, so give it a moment to shed cold if needed.
Add chicken and mango into the skillet. Cook until mango starts to very lightly brown.: Returning the chicken reunites flavors and starts to build the final texture. The mango will warm and begin to show tiny browned edges that amplify its sweetness and add complexity. Listen for a softer sizzle and watch for gentle caramelization; that golden touch deepens the dish. Be careful not to overheat the fruit, because too much browning can turn it bitter and overly soft.
Turn heat to low and add desired amount of sauce to the chicken and veggies and stir to coat well.: As the sauce hits the warm skillet it will steam and release a nutty, savory aroma, coating each piece with a glossy sheen. Stir thoroughly so the sauce clings to the chicken and broccoli , creating an even layer of flavor. Lower heat prevents the sauce from burning while allowing it to thicken slightly and meld with pan juices. A common mistake is pouring too much sauce too quickly, which can make the skillet soupy; adjust quantity to your preference and allow it to reduce gently.
Allow to simmer for about 5 minutes.: During this gentle simmer the sauce integrates into the ingredients, softening and concentrating flavors, and the aroma will deepen invitingly. You will see small bubbles at the edge of the pan and notice the sauce becoming silkier and clinging tighter. This period also finishes cooking the mango just enough to be tender without falling apart. If you skip this resting simmer, the flavors may taste disjointed, so resist the urge to serve immediately.
Pour over your favorite rice and garnish with chopped peanuts and fresh cilantro.: The final plating brings contrast, the warm stir fry against the neutral grain, and the crushed peanuts add audible crunch while cilantro brings a cooling, herbal note. The visual of green herbs and golden mango makes the dish feel celebratory. A small oversight is adding the peanuts too early, which can soften their crunch, so reserve them for finishing.
Refrigerate leftovers.: Storing leftovers cools the dish quickly and keeps flavors intact for the next day. Place in an airtight container once cooled to room temperature to preserve texture. When reheating, do so gently to avoid breaking down the fruit and to keep the chicken from drying out. A mistake I see often is reheating at too high a temperature, which can make the sauce separate and the meat tough.