Incredible Broccoli Cheese Soup

1 (10 ounce) box frozen chopped broccoli
3 tbsp margarine
1/4 onion, finely chopped
1/4 cup flour
1 (16 ounce) carton half and half
1 (14 ounce) can chicken broth
1/2 tsp salt
1/4 tsp black pepper
1/8 tsp cayenne pepper
1/2 tsp summer savory
1/2 (1 pound) box mild Mexican Velveeta cheese, cubed

Punch several holes in the box of broccoli and microwave for 5 minutes. Turn box in microwave and cook another 4 minutes. Leave in microwave for 3 minutes. In a large saucepan, melt margarine and saute the onion; do not brown. Add flour, stir; then gradually add half and half, chicken broth and seasonings. Stirring constantly; heat until mixture has thickened slightly. Do not let this come to a boil. Add chunks of cheese and heat while stirring, until cheese is melted. Add cooked broccoli. Serve piping hot. Serves 4-6.