Ingredients for hummus grilled cheese sandwich:

• 1 tablespoon unsalted butter
• ½ cup sliced fresh mushrooms
• ½ cup coarsely chopped sweet onion
• 4 slices bread
• 4 teaspoons mayonnaise
• 2/3 cup roasted red pepper hummus
• ½ cup shredded cheese

Hummus grilled cheese sandwich preparation:

1. Melt butter over medium heat in a skillet. 
2. Sauté mushrooms and onions until tender, about five minutes; remove from skillet and set aside. Spread mayonnaise on the bread slices. 
3. Turn the slices mayo-side-down and evenly spread hummus on all four slices. 
4. On only two of those slices, evenly layer mushroom-onion mixture followed by cheese. 
5. Top with remaining two bread slices with mayonnaise-side-up. Each of the two sandwiches will have hummus on the top and bottom, with cheese and mushroom mixture in the centre. 
6. Reheat the skillet over medium heat; place sandwiches mayonnaise-side-down in the skillet, and cook until golden brown on both sides and cheese is melted, five to six minutes, flipping half-way through.