need some advise here..... this rec. is from allrecipes.com called broccoli cheese soup. confused on the following direction.. in a stockpot, melt butter over medium heat. cook onions in butter until softened. stir in broccoli,and cover with chicken broth. simmer until broccoli is tender,about 10 to 15 min. Then says reduce heat and stir in cheese cubes until melted. mix in milk and garlic powder. Question do i leave it at medium heat for the 10 or 15 min. it takes to simmer the broccoli? THX.