1. Slice the ham and put it in a bowl for later use; Cut the butter into small pieces, put it in a bowl, and heat it in a microwave oven for dozens of seconds until it is completely melted; Peel the onion, wash it, control the moisture, and chop it for later use; Grind the cheese with a grinder and set it aside.
2. Cut the Hawaiian bread in half one by one, put the lower half into a 9x 13 inch baking tray in turn, divide the ham into 9 equal parts, put them on each bread respectively, and then put 1 slice of cheese in turn.
3. Spread a large amount of leek onion cream cheese sauce on the top half of each bread, and then cover the top half on the bottom half to make it overlap and make a sandwich.
4. Take a clean bowl, put the butter, Worcestershire sauce, onion and parmesan cheese into the bowl and mix them together, pour them on the surface of the sandwich and let them stand for at least 20 minutes.
5. Put the sandwich wrapped in tin foil into a preheated oven and bake at 175℃ for 20 minutes or until it is completely heated. Take it out and eat it.
PS: Hawaiian bread can be bought at the bakery or cooked at home in advance if you have time. The method is as follows: put 195g milk, 35g fine sugar, 3g salt and 260g high-gluten flour into the bread maker in turn, dig a small hole in the flour, bury 4g dry yeast in it, and start the dough mixing program for 30min. Cover the kneaded dough with a wet cloth and put it in a warm place to ferment until it is twice as big. In this weather, it is estimated that you should put it in an oven or steamer, put a pot of hot water under it and cover it for more than 40 minutes.
When the dough is cooked, roll it out to dry, then divide it into 9 portions, each of which is about 55g, and let it stand for 20 minutes. Knead the dough into a circle and press it deeply in the middle, or divide a dough into two parts and put it in a cake cup. Then put the baking tray into the oven, and start secondary fermentation at 30 degrees for 40 minutes. Sprinkle proper amount of flour on the fermented flour and bake at 2 10 degree 10 minute. If you don't want the surface to be colored, cover it with tin foil from 5 minutes.
If you want to further reduce calories, you can change it to whole wheat toast. The basis of calorie calculation here is divided into two, so instead of three slices of toast, only 1.5 slices are used, and the calories of all other ingredients are halved in the same way. As you can see, most of the breakfast above is low in calories, and considering the nutritional collocation, it is recommended to choose some nuts when adding meals in the morning, but don't overdo it because of the high fat content.