Day 3 of 31 days of pumpkin brings us to a savory recipe.
The secret to this pumpkin soup isn’t the sage (that’s in the title after all). It’s the fact that the onions are caramelized first. Caramelizing onions takes a bit of time (about 30 minutes, in fact), but it’s well worth it to bring out the sweet, nutty flavor hidden inside. The trick to caramelizing onions is to keep the temperature very low while they are sautéeing. Caramel is created when sugar undergoes controlled pyrolysis – the chemical decomposition that happens when organic stuff gets hot. If it gets too hot, then it gets charred. Char creates the familiar grill marks on a perfectly grilled steak. We’re not charring the onions, we’re trying to decompose the sugars in such a controlled way that they turn into caramel and that takes controlled temperature for a long time.
Elise Bauer, from Simply Recipes, created a stop-motion movie to show onions caramelizing. Her post about how to caramelize onions is here.