Buttered Vegetables

Name: Buttered Vegetables
Prep time: 15 min
Cook time: 10 min
Total time: 25 min
Cuisine: World Cuisine
Ingredients: 1 medium onion; 1½ cups green beans (chopped, 7 oz, Note 1 ); 3 medium carrots (7 oz/ 200 g); 4 cups cauliflower (about ½ a medium cauliflower/ 12.5 oz ); ¾ cup frozen peas (Note 2 ); ¼ cup butter (Note 3); ½ cup vegetable stock; small bunch parsley (Note 4); fine sea salt and freshly ground black pepper