Fancy Macaroni

Ingredients

• 4 cups macaroni
• 8 tablespoons butter (salted butter)
• 2 whole medium onions, cut in half and sliced thin
• 10 slices regular bacon
• 1 tablespoon bacon grease (reserved from bacon slices)
• ¼ cups all-purpose flour
• 2 cups whole or 2% milk
• ½ cups half-and-half
• 2 whole egg yolks, beaten
• salt and pepper, to taste
• ½ cups grated gruyere cheese
• ½ cups grated fontina cheese
• ½ cups grated parmigiano reggiano cheese
• 4 ounces, weight chevre (soft goat cheese)