Rinse the rice well, and let soak in cool water while you prep the other ingredients, or for at least 25-30 minutes. Basmati cooks up much nicer if it is soaked, but see the notes for adjustments in case you prefer to cook without the soaking.
Start the pressure cooker on the Brown/Saute LOW setting. Add oil and butter to the inner pot.
Lightly season the cut chicken with the seasoned salt of your choice, and mix so it's well covered.
Saute onions until softening and just starting to brown around the edges, stirring occasionally. Add garlic and ginger, plus the whole spices. Stir more often, and let everything cook for a couple of minutes until it gets fragrant..
Add the chicken, and fry stirring occasionally until it has a cooked surface all over and is starting to brown a little.
Stir in the ground spices. Continue to cook, stirring, for another minute or so.
Pour in the liquid, and add any additional bouillon, etc.--plus around 0.5 teaspoon extra salt if you're not already using salty broth or bouillon. Add in drained rice and chickpeas, and gently stir to combine so that all the rice is submerged.
Distribute frozen vegetables over the top.
Pressure cook on "Manual", HIGH (which should be the default pressure setting) for 5 minutes.
Let the pot sit to natural release the pressure for 10 minutes before opening the valve.
Gently fluff the finished rice to combine the ingredients, and let sit uncovered to rest and steam off for a few minutes before serving. Adjust salt to taste.
Enjoy, with whatever optional garnishes you prefer!