Grilled Garden Sandwiches

Quick and delicious grilled veggie and cheese sandwiches. Recipe from my Mom...she got it from a magazine but I can't make out which one.

• Ready In: 31 mins
• Serves: 4

Ingredients

• 5  tablespoons butter, softened and divided
• 1 (8 ounce) package  sliced fresh mushrooms
• 1⁄2 purple onion, thinly sliced
• 2  tablespoons mayonnaise
• 8  slices  sandwich bread
• 4  slices monterey jack cheese
• 2  tomatoes, sliced
• 4  slices American cheese

Directions

1. Melt 1 T. butter in a large nonstick skillet over medium-high heat. Add sliced mushrooms and onion, and saute 5 minutes or until tender. Drain.
2. Spread mayo on 1 side of half of the bread slices; top with Montery Jack cheese and tomato. Spoon mushroom mixture evenly over tomato; top with American cheese. Cover with remaining bread slices.
3. Spread about 1/2 T. of softened butter on 1 side of each sandwich. Cook sandwiches, buttered side down, in a hot nonstick skillet or griddle over medium heat until browned.
4. Spread remaining softened butter evenly on ungrilled side; turn and cook until lightly browned.