Sautee mushrooms in sea salt and olive oil. Set aside. Toast bread. Add chesse onto bread, top with sauteed mushrooms. May heat 1/2 sammie in pan to soften sprouts and melt cheese.
Add tomato, smash 1/2 of avocado, add to sammie. Top with spinach and lemon pepper.
Most of my family will add the cheese, tomato and avocado, the rest is a wild card, but great to offer, even if they just take one bite with the sprouts and the mushrooms, at least you are offering up new and different items to expand their tastebuds.
Did you know that it takes about 7-8 attempts/tastes to get a child to even know if they like a new food?