Step 1

Preheat oven to 375℉.

Step 2

Boil broccoli in a large pot for 2-3 minutes or until tender crisp. Drain very well.

Step 3

In a saucepan, cook onion in butter until tender. Add in flour, garlic, dry mustard, and salt. Allow to cook 1-2 minutes until bubbly. This is making a light roux.

Step 4

Add milk a little bit at a time whisking after each addition until smooth. Continue whisking over medium heat until thick and bubbly.

Step 5

Stir in cream cheese until smooth.

Step 6

Remove from heat and add in cheddar and parmesan cheese.

Step 7

Toss with broccoli and pour into the baking dish.

Step 8

Combine topping ingredients.

Step 9

Sprinkle the ingredients over broccoli cheese mixture. Bake for 20-25 minutes or until heated through and bubbly.