Chicken, Mushroom and Leek Risotto

Name: Chicken, Mushroom and Leek Risotto
Cuisine: European, Italian, Mediterranean
Ingredients: 500 g boneless chicken thigh; 1 tsp dried oregano; 1 tsp dried rosemary; Olive oil; 1 leek; 400 g button mushrooms; 1 cup arbioio rice; 750 ml chicken stock; A few big handfuls of baby spinach; ½ cup frozen peas; 2 cloves garlic; A big handful of fresh parsley or basil; 1 Tbsp butter; ¼ cup parmesan cheese, or more to taste; Salt and pepper, to taste