Use-it-up roasted vegetable frittata

Name: Use-it-up roasted vegetable frittata
Prep time: 5 min
Cook time: 55 min
Total time: 55 min
Yield: 6 portions
Ingredients: 60 g fresh baby spinach; 500 g leftover roast vegetables; 30 g Parmesan cheese; 5 sprigs fresh flat-leaf parsley; 30 g plain flour; 4 eggs; 300 g thickened cream; 1 - 2 pinches sea salt; 1 - 2 pinches ground black pepper; 100 g Danish feta; mixed salad greens