Here is what you need:
1 can black beans drained and rinsed
1 can pineapple, reserve the juice
1 cup couscous
1/2 cup water
1/3 cup warm water
2 tbs taco seasoning
Combine the pineapple juice and 1/2 cup water in a pan on the stove or in a microwave safe bowl. Bring the liquid to a boil, remove from heat, and add the couscous. Let sit for 5 minutes and fluff with a fork.
In a medium skillet over medium heat combine black beans and pineapple. Mix taco seasoning with 1/3 cup warm water and then add to black beans and pineapple. Cook until warmed through.
To serve place some couscous in a bowl and top with pineapple and black bean mixture.