Tacos are a go to for me, especially in the summertime. Both of these recipes are super simple and also incredibly versatile, I've had the salsa on top of chicken. Also a week later we put this rub on halibut and swapped out the pineapple for mango in the salsa to make fish tacos and they were damn good.
2 8-10oz steaks
Tortilla shells 
Fresh lime 
1 avocado 

3 T chili powder
3 T cumin 
3 T lime juice
1 T pepper
2 T chipotle paprika 

1. Combine rub ingredients, coat steaks and grill until medium rare
2. Slice thinly, place on tortilla shells and top with pineapple salsa
3. Add avocado or guac.