Preheat the oven to 350 degrees.
Mix the cumin,coriander,garam masala,ginger ,garlic,paprika,lemon juice and salt in a bowl.
Pat dry the cornish hens and rub the spice mixture generously all over and under the skin of the bird on both sides.
In a greased roasting tray place the potatoes,carrots and the cornish hens.Drizzle some oil all over and, bake for an hour and half until fully cooked.
Arrange on a serving tray and serve hot!