Uh oh...I don't have...And I want to make...
Perhaps the tips below will save you a trip to the grocery store!
1 cup buttermilk 1 tablespoon lemon juice or vinegar plus milk equal to 1 cup (stir; let stand 5 mintues)
1 small clove garlic 1/8 teaspoon garlic powder
1 cup tomato sauce 1/2 cup tomato paste plus 1/2 cup cold water
1 teaspoon vinegar 2 teaspoons lemon juice
1 cup whole milk 1 cup skim milk plus 2 tablespoons melted butter