Step 1

Mash garlic and 1/2 teaspoon coarse salt in mortar with pestle or in small bowl with back of spoon until paste forms. Using electric mixer, beat butter in medium bowl until smooth and creamy. Add garlic paste, quark, and next 6 ingredients; fold to combine. Season to taste with salt and more vinegar, if desired. DO AHEAD Can be made 1 day ahead. Cover and chill. Let stand at room temperature 1 hour, then stir before using.

Step 2

Serve with rye toast and drained Pickled Red Onions.

Step 3

Pair the flavorful Liptauer with a big white Austrian wine. We like the Hiedler 2008 'Löss' Grùner Veltliner ($16), a yeasty wine with a nice acidity.