Heat a pot on medium heat. Add the olive oil and diced onions. Sprinkle with the salt and sauté for a couple mins.

Chop up the cauliflower head, discard the stem and any green leaves, wash it and throw the cauliflower in the pot.

Add the chicken broth and bring to a boil. When it's boiling, turn down the heat a little and simmer until the cauliflower is nice and soft. About 8 to 10 mins or so.

Blend it up with an immersion blender or regular blender to make the cauliflower nice and smooth. Season with salt and pepper to taste.

Add 1/2 to 3/4 of the cheese and stir until it's melted.

Add the peas and smoked ham an stir to combine.

Meanwhile, heat a pot of water on high heat. When it's boiling, add the pasta and cook according to the directions on the box, but don't cook it all the way. Make sure there is a little bite to the pasta.

Drain the pasta well and add it to the cauliflower cheese sauce and the pour the whole mixture into a large casserole dish.

Sprinkle the remaining cheese on top and bake at 400 degrees until it's browned and bubbling. About 25 - 30 mins.

Serve!