Chicken skewers with yoghurt

Ingredients :

 4 chicken whites
 2 yogurt nature
 2 tablespoons of lemon juice
 3 tablespoons of olive oil
 1 tablespoon of mustard
 1 teaspoon rosemary
 1 teaspoon oregano
 1 teaspoon of cumin powder
 1 teaspoon of paprika
 1/4 teaspoon ginger
 
 salt, pepper