Heat oil in saucepan. Add the peppers, scallions, garlic, coriander, turmeric and cayenne. Saute over medium heat for 3 to 4 minutes, stirring occasionally. Stir in the stock or water. Add the shrimp or tofu and cook for another 3 to 4 minutes, until the shrimp is pink. Stir in the peas and cook for another minute.
Mix in the couscous and butter or margarine. Cover, remove from heat and let stand for 5 minutes.
Uncover the pan, and using a fork, fluff up the couscous and break up any lumps.
Add salt and pepper to taste. Serve on a platter, topped with toasted almonds, parsley and lemon wedges.