Whether you’re keeping it simple or going gourmet with additional fillings, we have top tips and ideas for reliable grilled cheese sandwiches that hit the spot.
To make the mushroom-onion mixture: Heat 2 tablespoons olive oil in a pan. Add 1 white onion (sliced thinly) and 1 (198-gram) can mushroom slices (drained). Mix well, then season with 1 teaspoon sugar, 1/2 teaspoon chili flakes (optional), salt, and pepper. Continue cooking until mixture is browned.