Shrimp Fajita Lettuce Wraps

smoked paprika

dried oregano

cumin

garlic powder

salt and black pepper (to taste)

butter or olive oil (divided)

medium shrimp (shelled and deveined)

lime juice

to 4 tablespoons chopped fresh cilantro

medium onion (sliced thinly)

medium bell peppers (I used a combo of red, yellow and green, cored, deseeded and sliced thinly)

head butter lettuce (leaves washed and dried)

sliced avocado and lime wedges (for serving)