Creamy Thai Coconut Chicken Soup (Instant Pot)

oil

small onion, quartered

lbs skinless and boneless chicken breast or chicken thighs, cut into cubes

Thai red curry paste, Mae Ploy brand

red bell pepper, cut into thick strips

slices galangal, optional

kaffir lime leaves, torn and bruised, optional

chicken broth

fish sauce or salt to taste

sugar

coconut milk

lime juice

Cilantro leaves