In a small saucepan, heat butter and add garlic.
Once the garlic is aromatic, add heavy cream and simmer on low.
In a separate pot, boil water and cook pasta according to package instructions. Drain and set aside.
Once the heavy cream has thickened (about 2 minutes), add Boursin and American cheese.
Once melted, fold in pasta and cubed ham.
Season to taste and serve immediately.