Preheat oven to 350.

Lightly butter a deep 2 1/2 quart baking dish.

Fill a large pot with water and bring to a rapid boil.

Add macaroni and the 1 TB oil.

Cook for 7 minutes, or until somewhat tender.

Drain well, and return to the pot.

Meanwhile, in a small saucepan, melt 8 TB of the butter.

Stir into macaroni.

In a large bowl, combine all of the shredded cheeses.

To the macaroni, add 1 1/2 cups of shredded cheeses, half and half, the cubed cheese and the eggs, and the seasoned salt and pepper.

Transfer to the prepared casserole dish, and top with remaining 1/2 cup shredded cheese.

Dot with remaining 1 TB of the butter.

Bake for 30-35 minutes or until the edges are golden brown and bubbly.