One Pot Chicken, Vegetable & Parmesan Orzo (Risoni)

Name: One Pot Chicken, Vegetable & Parmesan Orzo (Risoni)
Prep time: 5 min
Cook time: 10 min
Total time: 15 min
Cuisine: European, Italian, Mediterranean
Ingredients: 1 tbsp olive oil; 2 garlic cloves (, minced); 1/2 onion (, diced); 250g / 8oz chicken thigh or breast (, cut into bite size pieces); 2 1/2 cups frozen diced vegetables ((carrots, peas, corn, capsicum/peppers, anything!)); 1 1/2 cups orzo / risoni ((Note 1)); 1 1/2 tbsp flour; 2 1/4 cups (565 ml) milk (, any fat %); 2 cups (500 ml) chicken or vegetable stock / broth ((low sodium)); 3 cups baby spinach ((packed)); 3/4 cup (75g) parmesan ((grated)); Salt and pepper to taste; More parmesan; Parsley or chives, if desired