Briny sardines get added intensity from fresh onion and Dijon mustard in this open-face sandwich from chef and radio host Mike Colameco. This recipe first appeared in our April 2011 special Sandwich Issue with the article Forgotten Fish.
- 3 tbsp. Dijon mustard
- 2 slices rye bread, toasted
- 2 large leaves bibb lettuce
- 1 (4-oz.) can sardines in oil, drained, plus 2 tsp. reserved oil
- 1⁄2 small yellow onion, thinly sliced crosswise
- Kosher salt and freshly ground black pepper, to taste