Heat 1 Tbsp of the olive oil in a pan over medium heat, add couscous, and lightly fry until golden brown, about 2-3 minutes.
Add 1 cup of cold water and juice of one mandarin to pan and stir until absorbed. Add additional 1/2 cup water, stir until couscous is cooked through, about 10 minutes.
Remove couscous from heat, add mint, Feta, cucumber, and peeled mandarin segments.
Add 3 tablespoons of mandarin olive oil, season with salt, pepper, mandarin zest, and toss.