Chili Lime Tilapia with Avocado Cream

For the tilapia

1 pound tilapia fillets 

1 tbs chili powder

1 ts cumin 

1 ts cayenne pepper

½ ts salt

½ ts black pepper

1 tbs lime juice (about 1 lime)

1 tbs olive oil

For the avocado crema

1 avocado

½ cup cilantro, roughly chopped

½ ts salt

½ ts black pepper

1 tbs lime juice (about 1 lime)

¼ cup yogurt