In large sauce pan, combine 1 cup water, pinch of salt and bring to boil. Add 1 cup of Couscous. Remove from heat and cover with lid for let stand 5 minutes. Fluff with fork.
Mix lime juice, olive oil, cumin, salt and pepper together. Set aside
Combine corn, black beans, spinach and tomatoes in bowl.
Add liquid mixture.
Add couscous and diced avocado.
Mix well and season with salt and pepper.