Spicy Chicken without mint zucchini

2 tablespoons extra virgin olive oil 1 tablespoon butter 1 onion , finely chopped 3 sprigs rosemary , 1 finely chopped, the other 2 cut in half 3 tablespoons[...]

4 boneless skinless chicken breasts 2 teaspoons hot curry powder 2 teaspoons ground ginger 1/2 teaspoon mustard powder 2 teaspoons ground cumin 4 teaspoons[...]