INGREDIENTS
2 8 ounce packages
cream cheese, softened to room temperature
1 cup
sour cream (or mayonnaise, or half sour cream and half mayonnaise)
2
medium-large sweet onions
6 cloves
garlic
1/2 tbsp
butter
1/2 tbsp
olive oil
salt and pepper
heaping 1/2 cup freshly grated Parmesan cheese
heaping 1/2 cup grated Gruyere or mild swiss cheese