Step 1

Heat olive oil in a large skillet over medium high heat.

Step 2

Add the cauliflower and broccoli rices and season with the salt and pepper.

Step 3

Cook, stirring often, until just tender - about 8-9 minutes.

Step 4

Transfer the rice mixture to a bowl, wipe the pan clean, and return it to medium heat on the stove top.

Step 5

Add the butter. Once melted, whisk in the heavy whipping cream and mustard powder until well blended. Continue to cook another minute or two or until hot and bubbly.

Step 6

Whisk in the cheddar cheese until melted and well blended.

Step 7

Stir back in the cauliflower and broccoli and coat evenly in the cheese sauce.

Step 8

Continue to cook an additional 2-3 minutes, or until everything is well combine and heated through.