Valentine's Day is coming up; find out what to cook for your date on this week's Cooking Issues! Dave Arnold and Nastassia Lopez are back in the studio, and they're tackling your culinary questions. Find out the best way to cook a savory cheesecake in a circulator! Why is espresso often served with carbonated water? Dave offers some suggestions for juicing greens, and talks about thickening hot sauce with different starches. What qualifies as true buttermilk? Dave also talks about some ways to balance a vinaigrette, and shares his Valentine's Day recipe ideas! This episode has been sponsored by The Brooklyn Kitchen.