First, season Korean beef sirloin (300g) with olive oil, salt, and pepper (a little bit)

Then, wash the potatoes thoroughly, wrap them in foil, bake them in the oven for about 20 to 30 minutes, take them out, and cut them into the shape of a cross. The picture above is after baking^^ If you don't have an oven, you can boil potatoes or sweet potatoes and peel them and mash them

Chop the mushrooms and onions into bite-size pieces. It would be good to prepare other vegetables such as broccoli and bell pepper

Steak sauce is... I just enjoy making it simple without any special seasoning, but first, I put olive oil in a pot and stir-fry minced garlic (0. Pepperoncino minced garlic (3 pieces).. Combine steak sauce (1/2 cup) + ketchup (+ lemon juice (+ 1/2 cup white wine) and boil for about 1 minute. Pepperoncino is an Italian pepper that has a spicy taste. If you don't have it, you don't have to put it in^^ You can buy it on the imported food site when you search on the Internet. If you don't have white wine, you can buy soju or wine

Grill the sirloin, mushrooms, and onions on a grill or pan until golden brown, and put them on a plate... Put the steak sauce on top of it,

Serve with oven-baked baked potatoes and you're done!!! When you eat it, it's better if you put mayonnaise on the cross-shaped potato and sprinkle parsley powder