Vegetarian

Tangy homemade pickles and onions bring intense flavor and satisfying heft to these sandwiches. However, you can omit step 1 and use jarred pickles; just do keep in mind that these may increase your sodium intake.

We topped these burgers with smoked Cheddar cheese, but you can use another type of cheese, or omit it entirely. To clean the mushroom caps, wipe them with a damp paper towel; do not rinse or soak them because they will remain soggy even after cooking.

You’ll need to make these onions at least 1 week in advance.

Use half of this recipe in the burgers and half for the grilled tomato sauce.

The ingredients can be prepared the day before and refrigerated.

Let dressing sit overnight to meld flavors.

Sesame oil is a good source of vitamin E.