Ham and Pea Pasta- Lactose Free

So, I am a really good cook- I will own up to that.  What I am terrible at is actually creating a recipe, and writing down what I do so that I can recreate it exactly.

So posting a recipe for Ham and Pea Pasta that I adapted to be lactose-free, not dairy free, lactose free.  There are a lot more sinful versions of this pasta using a carbonara base, or heavy cream, and I wanted to simplify this dish, use one pot, not use superfluous ingredients, because right now I can't just run out to the store to get something, and just make it something I didn't have to take dairy pills to eat.

16 ounces Pasta

1/4 cup LF butter
one small onion, minced
2 tablespoons all-purpose flour
1/2 cup LF milk and non-fat greek yogurt mixed together (About 1/4 cup of each item mixed together)
1/2 cup freshly grated Parmesan (I like to use my micro-plain to grate Parmesan cheese, don't waste your time with the pre-grated stuff)
Kosher salt and freshly ground black pepper, to taste

2 cups chopped ham
1.5-ish cup peas (I probably really use about 2 cups, I like things veggie heavy)

I boiled water in a sauté pan.  I love the sauté pan, it is probably my most used pan.  Then I blanched the peas in that water, took them out of the water with a spider/slotted spoon, reserve peas.  

I then added salt to the boiling water and cooked the pasta in that water.   Put pasta into colander while reserving at least 2 cups of the pasta water- don't toss this!

 Rinse the pasta to stop cooking while you make the sauce.  

Back in the sauté pan. Melt the butter, sautés the onion in the butter 1-2 minutes until soft.  Add the flour and whisk until cooked and turned golden 1-4 minutes.  Then gradually add about 1 cup of the pasta water slowly while whisking to form a thick sauce.  Then added in the milk-yogurt mix mix slowly still whisking and then the parm. Add more pasta water to thin out the sauce, salt and pepper to taste.  

Then add the pasta, ham and pea. stir. Viola. Grate a little parm and/or crack a little pepper on top once dished out to make it look pretty.